WordPress 6.8 Bug – Button Sizing Not Working – Help

I’ve experienced a bug after upgrading to 6.8, and I wondered if anyone has experienced similar and knows of an easy fix?

I use the buttons feature quite a lot within WordPress (standard one – not anything custom), and these are all 25% width. However, after the update they are now all appearing at 100% width. When I try to use the width button in settings to readjust the width to 25% it does absouletely nothing. I’ve tried editing the html but I get an error message. My only option seems to manually remake each and every button.

Anyone know how to fix this? My site has tons of buttons and it would take days to fix manually.