Graphs take extremely long time to show

I have an issue for quite some time. My graphs take an extremely long time to load. This issue appears on all of my devices with different browsers. See the gif below:

Here is the configuration I use for one panel:

cards:
  - cards:
      - entities:
          - entity: sensor.bedroom_temperature_avg
            index: 0
            name: Bedroom
          - entity: sensor.0x00158d00033b0e50_temperature
            index: 1
            name: Hall
        hours_to_show: 24
        icon: 'mdi:thermometer'
        line_width: 4
        name: Temperature
        points_per_hour: 3
        show:
          fill: false
          legend: false
        smoothing: true
        type: 'custom:mini-graph-card'
        update_interval: 30
      - entities:
          - entity: sensor.bedroom_humidity_avg
            index: 2
            name: Bedroom
          - entity: sensor.0x00158d00033b0e50_humidity
            index: 1
            name: Hall
          - entity: sensor.bedroom_humidity_avg
            index: 2
            name: Bedroom
        hours_to_show: 24
        icon: 'mdi:water-percent'
        line_width: 4
        name: Humidity
        points_per_hour: 3
        show:
          fill: false
          legend: false
        smoothing: true
        type: 'custom:mini-graph-card'
        update_interval: 30
    type: horizontal-stack
title: Inside Conditions
type: vertical-stack

Does anyone know what can cause this?

[kalkih]

Thanks @ildar170975 , should indeed have been fixed in the latest version by https://github.com/kalkih/mini-graph-card/pull/452. Thanks for confirming, closing this now.

[ildar170975]

Again tested today 2 cases in vertical-stack:

• update_interval=0
• update_interval=60

In both cases “hours_to_show=72”, a sensor is updated every 1 minute. I do not see the bug anymore - in both cases the graph is displayed without a delay. Probably the problem was solved either in mini-graph-card or in vertical-stack.