It begin happening since several days. Suddenly friend activity window become a completely empty. It's not like there is nothing, but the UI somehow broken, because even side menu is completely missing. Like it's not loading due to some error.

Then on next day I see some activing, menu is back, BUT I can only see activity for this single day.

At the end of day I shared some screenshots (from Borderlands 3 if it matters, it was ok say week ago) and boom - activity page is broken again.

On next day it repeats..

Anyone has similar issue? What should I do? Is there a way to debug it (see logs or whatever)?

I tried to completely reinstall Steam, deleting steam folder in local apps folder too, but the problem still. I strongly suspect something is wrong on the Steam side, but couldn't find similar reports about the issue.