When one of the puzzles is loaded (When the loading animation is finished), the board looks like this shown in the image below

Remembering that this only happens when my browser screen is small
Backboard is out of bounds in website screen.
Pieces can placeable for any resolutions but backboard isn't.
It's visual glitch :)
Is this still happening?
Is this still happening?
Yeah!
Method to reproduce (Google Chrome):
It may take a few tries but it was not a fluke.
I would guess it is related to animation rather than the page-load.

Thanks for the steps. It took me ~10 attempts to reproduce.
I tried reloading man times and it appears to be fixed by ResizeObserver (see above) as intended. Please reopen if not.
Yes I also cannot reproduce, seems fixed.
馃憤
Most helpful comment
Thanks for the steps. It took me ~10 attempts to reproduce.