Fractional scaling causes windows borders to behave strangely when resized

[AnthemV]

If fractional scaling is enabled in Mutter's Wayland session with scale-monitor-framebuffer, windows behave unpredictably when resized at scales greater than 100%. They flicker between having correct borders, borders that are a pixel too large, or borders that have a pixel worth of space between them and the window.

Note that I'm using Firefox for these examples, but it occurs with all apps that are rounded by the extension.

100% Scaling	125% Scaling

Video

https://github.com/user-attachments/assets/e9dbc406-b82a-4c16-bb16-d8531c3b7508

System Details

• Nobara Linux 40 (GNOME Edition)
• Wayland
• Mutter 46.3.1-10.patched.fc40
• Gnome Shell 46.3.1-10.fc40.clang
• Intel Integrated Graphics

Extension Settings


[LSeelig]

I experience this as well. I adjust the border for qt apps, but there isn't an obvious solution for gtk.