Website icons disappear from side panel

[Kucik]

I've added two websites on my side panel, for quick access (Google Keep and Facebook Messenger). Everything works well, but I've noticed that their icons (not sure how they're really called) tend to disappear every day or even everytime I open up Vivaldi and just turn to generic file icons. When I open those sites the icons reappear and stay until I close and open the browser again.

The icons for my shortcuts on the top bar work without any problems.

Here are some screenshots (before and after Keep and Messenger)

Anybody know why this happens and if there is a fix for that?

[luetage]

This should help: https://forum.vivaldi.net/topic/16801/force-your-web-panels-to-display-their-favicons