Masks and backdrop-filter don't work on uiverse

[regal rain]

For some reason, idk why but using mask and backdrop-filter doesn't work.

blue is uiverse, green is where it's working properly.

Vivaldi    7.0.3495.15 (Stable channel) stable (64-bit) 
Revision    2cd8ae09bb5a6e10689b472f6f28cd66789cc6b3
OS    Linux
JavaScript    V8 13.0.245.18
User Agent    Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Command Line    /usr/bin/vivaldi-stable --password-store=gnome --flag-switches-begin --force-color-profile=srgb --flag-switches-end --save-page-as-mhtml```

oh it might be a bug in chrome kuz it works in firefox

that is so weird kuz I can't reproduce in a minimal shadow dom

omfg when I disable this it gets fixed

what the hell

oh also disabling overflow-clip makes it works again

minimal repr

???

I can't reproduce tho

wait aha I can reproduce

imma try to make a minial repr in codepen and see if the chrome team can fix

minimal repr https://codepen.io/true-cc/pen/vEBGbwe

it's not a shadowdom issue

lol