Mini-graph-card: Empty block instead of widget (Not always)

[yadenisenko]

Hello,
Sometimes the widget is not displayed and there is an empty block in its place and there are no errors in the chrome console.
But when I open the lovelace edit, the widgets appear immediately. It seems to me that the problem arises when I open the home assistant in my smartphone. I also did testing in google chrome on a PC using imitation display as on a mobile device and then the problem also appears.
The problem also occurs with the simple widget from the example:

• type: custom:mini-graph-card
  entities:
  
  
  
  • sensor.temperature
  
  

Home Assistant 0.116.2, docker_version | 19.03.13, Debian GNU/Linux 10 (buster)

[JackTalisker]

I have quite the same issue.
I don't have empty blocks but the cards simply disappear if I start HA with my custom dashboard or I refresh it.
If I change view with anything else (e.g. settings or default auto dashboard) and then I return to my custom dashboard, the cards appear again (then if I refresh the page the cards disappear again).
This behaviour occurs either in a PC with google chrome or with the android app.
HA 0.116.4 Core on a Raspbian Buster RPi 3/ Python 3.8.6.

I have two other custom mini graph cards in one horizontal stack and the issue does not occur.

[mateuszlukasik-PL]

Same issue like Jack wrote (HA Core 0.116.4, Debian buster, python 3.7). There was no problem on 0.115.

[mmalina]

It happens to me too. I need to refresh in Safari several times (full reload with Cmd+Option+R) before the card is displayed. I'm on latest full Home Assistant install on RPI 3b+.

[rchovan]

Hi,
I have same behavior on Android device. Widgets are not loaded on app start, but when I click edit on dashboard, they are loaded. After restarting app, they are missing again. https://github.com/home-assistant/android/issues/1107