Syntax highlighting doesn't go away when problem fixed

Parts of the code where there is a problem to be fixed are underlined, and variables that are unused are shadowed. This goes away when the problem is fixed, but NOT if there is still other problems to be fixed in the file.

For example, let’s take the following file with 2 problems:

import os           # [Pyright] [H] "os" is not accessed
a = "foo"
b = 2
c = a + b           # [Pyright reportGeneralTypeIssues] [E] ...

The os variable is shadowed, and a+b is underlined.

If I fix the error [E] by modifying b = 2 into b = "bar", then the error [E] goes away but a + b is style underlined.

Highlighting becomes OK only if I also fix the [H] problem, or if I reload the file.

Any idea on what’s wrong here ?

I also noticed that if only fixing the [E] and writing (:w), then reloading (:e) will correctly remove the underlined a + b, but undoing (u) will redo the underlining of a + b (and not any other modificaition).

Edit: Screenshots:

There is 2 problems	One problem fixed, but underlining remains	All problems fixed, underlining goes away

What’s the output of :CocCommand pyright.version

[coc.nvim] coc-pyright 1.1.181 with Pyright 1.1.184

What’s the output of :CocCommand workspace.showOutput Pyright

Workspace: /home/p20aime
Using python from /home/p20aime/miniconda3/bin/python

[Warn  - 9:08:12 AM] Ignored rootPath /home/p20aime of client "pyright"
[Info  - 9:08:12 AM] Pyright language server 1.1.184 starting
[Info  - 9:08:12 AM] Server root directory: /home/p20aime/.config/coc/extensions/node_modules/coc-pyright/node_modules/pyright/dist/
[Info  - 9:08:12 AM] No pyproject.toml file found.
[Info  - 9:08:12 AM] Setting pythonPath for service "<default>": "/home/p20aime/miniconda3/bin/python"
[Warn  - 9:08:12 AM] stubPath typings is not a valid directory.
[Info  - 9:08:12 AM] Assuming Python version 3.9
[Info  - 9:08:12 AM] Assuming Python platform Linux
[Warn  - 9:08:12 AM] Exception received when installing file system watcher: TypeError [ERR_FEATURE_UNAVAILABLE_ON_PLATFORM]: The feature watch recursively is unavailable on the current platform, which is being used to run Node.js
[Warn  - 9:08:12 AM] Exception received when installing file system watcher: TypeError [ERR_FEATURE_UNAVAILABLE_ON_PLATFORM]: The feature watch recursively is unavailable on the current platform, which is being used to run Node.js
[Warn  - 9:08:12 AM] Exception received when installing file system watcher: TypeError [ERR_FEATURE_UNAVAILABLE_ON_PLATFORM]: The feature watch recursively is unavailable on the current platform, which is being used to run Node.js
[Warn  - 9:08:12 AM] Exception received when installing file system watcher: TypeError [ERR_FEATURE_UNAVAILABLE_ON_PLATFORM]: The feature watch recursively is unavailable on the current platform, which is being used to run Node.js
[Info  - 9:08:12 AM] Searching for source files
[Info  - 9:08:12 AM] No source files found.

[Paul-Aime]

So I removed all vim installations and installed vim 8.2 from ppa:jonathonf/vim and there is no issue anymore

[fannheyward]

I’ve tested with Vim 8.2, can’t reproduce.