I noticed a bug on 9x9 which seems to be dependent on windows size in chrome.
Basicly it seems the viewport can’t calculate the correct focus point somehow so it goes crazy in trying to find it, like somebody is shaking the window.
The issue was resolved by changing windows size, either by maximizing or by just making the window wider. After that I could no recreate it.
(I also made a video of the bug in effect)
I suspect it might be a which viewport is we on issue when you open the game and just the incorrect size.