Fixed Container with Overflow Sibling breaks Viewport

[mxkyb]

On a Galaxy A54 Android 12 it is reproducible with

• Samsung Internet 17.0.6.0
• Samsung Internet 17.0.7.34

It is, by the way, a known problem:

• User-scalable=no not working in Samsung Internet v5.4 · Issue #12 · SamsungInternet/support · GitHub
• "Manual Zoom" breaks position: sticky · Issue #64 · SamsungInternet/support · GitHub
• "Manual Zoom" breaks position: sticky - #8 by dan1589385535