STEPS TO REPRODUCE
1. Open Firefox or an electron app such as TTTH
2. Move mouse around on elements, expecting hand cursor on hyperlinks, font selector cursor on text etc.
3. 

OBSERVED RESULT
Seems to pick cursor style that it entered window with, or randomly picks up cursor style if you quickly move into the page. Keeps that cursor style as you pan across window, so if it picks up the window-stretching cursor, that's what you have to work with on the window now.  Cursor works correctly otherwise

EXPECTED RESULT
Cursor changes to match screen element (hyperlink=hand, textbox=text selector, checkbox=arrow, etc)

Archlinux up to date, plasma 5.23.90, FF 96.0.2, TTTH running electron 11.3.0

ADDITIONAL INFORMATION

Seems to work fine in Webslice widget, correct cursors are shown as you move across elements.