Bar not reconfigured on screen change

I am using Qtile on a laptop with a second monitor, the bar is by default on the second monitor since that is the primary screen. When unplugging the monitor from the laptop it normally reconfigures the screens and the bar appears on the laptop screen, but since the past few days this does not happen correctly. Instead of the bar appearing on the laptop screen, it shows an empty space above the window that is about the size of the bar.

Steps to reproduce

1. Have 2 screens connected
2. Disconnect the primary screen that has the bar present
3. Secondary screen becomes primary but the bar does not appear

Qtile version

qtile --version
0.18.2.dev100+g802b82e5

Log

2021-11-17 16:40:00,850 ERROR libqtile hook.py:fire():L395 Error in hook screen_change
Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/libqtile/hook.py", line 393, in fire
    i(*args, **kwargs)
  File "/usr/lib/python3.9/site-packages/libqtile/core/manager.py", line 356, in cmd_reconfigure_screens
    self._process_screens()
  File "/usr/lib/python3.9/site-packages/libqtile/core/manager.py", line 337, in _process_screens
    scr._configure(self, i, x, y, w, h, grp)
  File "/usr/lib/python3.9/site-packages/libqtile/config.py", line 289, in _configure
    self.set_group(group)
  File "/usr/lib/python3.9/site-packages/libqtile/config.py", line 348, in set_group
    g1 = self.group
AttributeError: 'Screen' object has no attribute 'group'

Config

####################################################################################################
# Imports
####################################################################################################
import os
import subprocess

from typing import List  # noqa: F401

from libqtile import bar, layout, hook, qtile
from qtile_extras import widget
from libqtile.config import Click, Drag, Group, Key, Match, Screen, ScratchPad, DropDown
from libqtile.lazy import lazy
from libqtile.log_utils import logger

from colorschemes import dracula as colors
from qtile_extras.widget.decorations import RectDecoration


####################################################################################################
# Hooks
####################################################################################################
@hook.subscribe.startup_once
def autostart():
    home = os.path.expanduser('/home/simon/.config/qtile/autostart.sh')
    subprocess.call([home])


# @hook.subscribe.screen_change
# def screen_change(event):
#     home = os.path.expanduser('/home/simon/.config/qtile/scripts/screen_change.sh')
#     subprocess.call([home])



# @hook.subscribe.client_new
# def bring_windows_to_front(window):
# logger.warning(window.window.get_wm_class())

####################################################################################################
# Key bindings
####################################################################################################
mod = "mod4"
alt_key = "mod1"
terminal = "kitty"
scr_locker = "betterlockscreen -l"

keys = [
    Key([mod], "h", lazy.layout.left(), desc="Move focus to left"),
    Key([mod], "l", lazy.layout.right(), desc="Move focus to right"),
    Key([mod], "j", lazy.group.next_window(), desc="Move focus down"),
    Key([mod], "k", lazy.group.prev_window(), desc="Move focus up"),
    Key([alt_key], "j", lazy.group.next_window(), desc="Move window focus to other window"),
    Key([mod], "u", lazy.next_urgent()),

    Key([mod, "shift"], "h", lazy.layout.shuffle_left(), desc="Move window to the left"),
    Key([mod, "shift"], "l", lazy.layout.shuffle_right(), desc="Move window to the right"),
    Key([mod, "shift"], "j", lazy.layout.shuffle_down(), desc="Move window down"),
    Key([mod, "shift"], "k", lazy.layout.shuffle_up(), desc="Move window up"),

    Key([mod, "control"], "h", lazy.layout.grow(), desc="Grow window to the left"),
    Key([mod, "control"], "l", lazy.layout.shrink(), desc="Grow window to the right"),
    Key([mod], "n", lazy.layout.normalize(), desc="Reset all window sizes"),
    Key([mod], "o", lazy.layout.maximize(), desc="Reset all window sizes"),
    Key([mod, "control"], "Return", lazy.layout.flip()),

    Key([mod, "shift"], "Return", lazy.layout.toggle_split(), desc="Toggle between split and unsplit sides of stack"),
    Key([mod], "Return", lazy.spawn(terminal), desc="Launch terminal"),

    Key([mod], "Tab", lazy.next_layout(), desc="Toggle between layouts"),
    Key([mod], "w", lazy.window.kill(), desc="Kill focused window"),
    Key([mod], "space", lazy.window.toggle_floating()),
    Key([mod], "f", lazy.window.toggle_fullscreen()),
    Key([mod, "control"], 'j', lazy.next_screen(), desc='Next monitor'),

    Key([mod, "control"], "r", lazy.restart(), desc="Restart Qtile"),
    Key([mod, "control"], "q", lazy.shutdown(), desc="Shutdown Qtile"),
    Key([mod], "r", lazy.spawn("rofi -show combi")),
    Key([mod], "p", lazy.spawn("dmenu_run")),
    Key([mod], "q", lazy.spawn("rofi -show power-menu -modi power-menu:rofi-power-menu -lines 6")),

    Key([], "XF86MonBrightnessDown", lazy.spawn("sudo ybacklight -dec 5")),
    Key([], "XF86MonBrightnessUp", lazy.spawn("sudo ybacklight -inc 5")),

    Key([], "Print", lazy.spawn("flameshot gui")),
    Key([mod], "d", lazy.spawn("emacs")),
    Key([mod], "a", lazy.spawn("emacs /home/simon/.config/qtile/config.py")),
    Key([mod], "z", lazy.group['scratchpad'].dropdown_toggle('term')),
    Key([mod], "p", lazy.group['scratchpad'].dropdown_toggle('insomnia')),
    Key([mod], "n", lazy.group['scratchpad'].dropdown_toggle('boostnote')),
    # Key([mod], "b", lazy.group['scratchpad'].dropdown_toggle('browser')),
    Key([alt_key], "l", lazy.spawn(scr_locker)),
    Key([mod], "b", lazy.hide_show_bar("top")),
    # Key(["control", "shift"], "h", lazy.spawn("/home/simon/.local/bin/clipmenu-rofi"))

    # Dunst
    Key(["control"], "space", lazy.spawn("dunstctl close")),
    Key(["control", "shift"], "space", lazy.spawn("dunstctl close-all"))
]

####################################################################################################
# Groups
####################################################################################################
groups = [
    Group(name='1', layout='monadtall'),
    Group(name='2', layout='max',
          matches=[Match(wm_class='jetbrains-idea'), Match(wm_class='jetbrains-toolbox')]),
    Group(name='3', layout='monadtall'),
    Group(name='4', layout='monadtall'),
    Group(name='5', layout='monadtall'),
    Group(name='6', layout='monadtall'),
    Group(name='7', layout='monadtall'),
    Group(name='8', layout='max', matches=[
        Match(wm_class='slack'),
        Match(wm_class='microsoft teams - preview'),
        Match(wm_class='hexchat'),
        Match(wm_class='discord')]),
    Group(name='9', layout='max', matches=[Match(wm_class="evolution")]),
]

for i in groups:
    keys.extend([
        Key([mod], i.name, lazy.group[i.name].toscreen(toggle=True),
            desc="Switch to group {}".format(i.name)),
        Key([mod, "shift"], i.name, lazy.window.togroup(i.name, switch_group=True),
            desc="Switch to & move focused window to group {}".format(i.name)),
    ])

# Append scratchpad after setting up group keybinds
groups.append(ScratchPad("scratchpad", [
    DropDown("term", "kitty", opacity=1, height=0.4, x=0, width=0.998, on_focus_lost_hide=True),
    DropDown("insomnia", "insomnia", opacity=1, height=0.997, x=0, width=0.998, on_focus_lost_hide=True),
    DropDown("boostnote", "boostnote", opacity=1, height=0.997, x=0, width=0.998, on_focus_lost_hide=True),
]))

####################################################################################################
# Theming
####################################################################################################


layout_border = dict(
    border_width=2,
    border_focus=colors.border_focus,
    border_normal=colors.border_normal,
)

layout_theme = {
    **layout_border,
    "margin": 5,
}

####################################################################################################
# Layouts
####################################################################################################
layouts = [
    layout.Max(**layout_theme),
    layout.MonadTall(**layout_theme, single_border_width=0, single_margin=0, ratio=0.6),
    layout.MonadWide(**layout_theme, single_border_width=0, single_margin=0, ratio=0.6),
]

####################################################################################################
# Bar
####################################################################################################
widget_defaults = dict(
    font="JuliaMono Bold", fontsize=11, background=colors.background
)
widget_defaults_2 = dict(
    font="JuliaMono Bold", fontsize=11
)
extension_defaults = widget_defaults_2.copy()

delimiter_widget = widget.Sep(
    padding=10,
    linewidth=2,
    size_percent=70,
    foreground=colors.alternate_foreground
)
decor = {
    "decorations": [
        RectDecoration(colour=colors.color1, radius=5, filled=True, padding_y=5)
    ],
    "padding": 10,
}


simpleBar = bar.Bar(
    [
        widget.Spacer(length=5),
        widget.GroupBox(
            highlight_method="line",
            urgent_alert_method="text",
            urgent_text=colors.groupbox_urgent,
            block_highlight_text_color="#ffffff",
            this_current_screen_border=colors.groupbox_current_screen_border,
            this_screen_border=colors.groupbox_screen_border,
            other_screen_border=colors.groupbox_other_screen_border,
            other_current_screen_border=colors.groupbox_current_screen_border,
            highlight_color=colors.highlight_color,
            inactive=colors.groupbox_inactive,
            borderwidth=2,
            margin_x=2,
            margin_y=4,
            padding_x=4,
            disable_drag=True,
            hide_unused=False,
            font="JuliaMono SemiBold"
        ),
        widget.Spacer(length=5),
        widget.WindowCount(fmt="[{}]", padding=0, foreground=colors.widget_accent_foreground),
        widget.CurrentLayout(fmt="[{}]", padding=0, foreground=colors.widget_accent_foreground),
        widget.Spacer(length=3),
        widget.WindowName(for_current_screen=True),
        widget.Spacer(length=8),
        delimiter_widget,
        widget.TextBox(fmt="CPU", foreground=colors.widget_accent_foreground, padding=4, font="JuliaMono ExtraBold"),
        widget.CPU(format="{load_percent}%", padding=0),
        widget.Spacer(length=3),
        delimiter_widget,
        widget.TextBox(fmt="MEM", foreground=colors.widget_accent_foreground, padding=4, font="JuliaMono ExtraBold"),
        widget.Memory(format="{MemUsed:.0f}Mb", padding=0),
        widget.Spacer(length=3),
        delimiter_widget,
        widget.Spacer(length=3),
        widget.Clock(format="%a %d %b, %H:%M", padding=0),
        widget.Spacer(length=3),
        delimiter_widget,
        widget.Systray(padding=2, background=colors.background),
        widget.Spacer(length=10),
    ],
    23,
)

screens = [
    Screen(top=simpleBar)
]


####################################################################################################
# Configurations
####################################################################################################
# Drag floating layouts.
mouse = [
    Drag([mod], "Button1", lazy.window.set_position_floating(), start=lazy.window.get_position()),
    Drag([mod], "Button3", lazy.window.set_size_floating(), start=lazy.window.get_size()),
    Click([mod], "Button2", lazy.window.bring_to_front())
]

dgroups_key_binder = None
dgroups_app_rules = []  # type: List
bring_front_click = False
cursor_warp = False
floating_layout = layout.Floating(
    **layout_border,
    float_rules=[
        # Run the utility of `xprop` to see the wm class and name of an X client.
        *layout.Floating.default_float_rules,
        Match(wm_class='confirmreset'),  # gitk
        Match(wm_class='makebranch'),  # gitk
        Match(wm_class='maketag'),  # gitk
        Match(wm_class='ssh-askpass'),  # ssh-askpass
        Match(title='branchdialog'),  # gitk
        Match(title='pinentry'),  # GPG key password entry
        Match(title='Reminders'),  # Evolution reminders
        Match(wm_class='copyq')
    ])
auto_fullscreen = True
focus_on_window_activation = "focus"
reconfigure_screens = True
follow_mouse_focus = True

# If things like steam games want to auto-minimize themselves when losing
# focus, should we respect this or not?
auto_minimize = True

# XXX: Gasp! We're lying here. In fact, nobody really uses or cares about this
# string besides java UI toolkits; you can see several discussions on the
# mailing lists, GitHub issues, and other WM documentation that suggest setting
# this string if your java app doesn't work correctly. We may as well just lie
# and say that we're a working one by default.
#
# We choose LG3D to maximize irony: it is a 3D non-reparenting WM written in
# java that happens to be on java's whitelist.
wmname = "LG3D"

[elcaven]

Might not be able to get to that before the weekend, but I can certainly see over the weekend to try and identify it.

[asegarra]

Aaah I see, I misunderstood how that worked. I also now can replicate the dmenu issue 100% but will file a separate issue.