Firefox 86-beta on Plasma 5.21-beta Wayland major issues

Ok, this is an awful lot of betas and very specific, but I figured I’ll ask nonetheless.

The web view doesn’t update on changes anymore (page-loading, scrolling), but only on forced redraws e.g. when resizing the browser-window. Is somebody else experiencing this, or is it just me?

Firefox 85- is fine.

You said it yourself! Beta! :wink:

After some investigation it also happens on a new installation with plasma 5.20 stable. - Maybe time to open a bug report.