Comment 5 for bug 2003339

This has been happening to me as well. Today, it got so bad that kwin was crashing every few minutes. Interestingly, things stablized after I killed and restarted plasmashell.

Operating System: Arch Linux
KDE Plasma Version: 5.26.2
KDE Frameworks Version: 5.99.0
Qt Version: 5.15.7
Kernel Version: 5.15.76-1-lts (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-10510U CPU @ 1.80GHz
Memory: 15.3 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics
Manufacturer: LENOVO
Product Name: 20UBCTO1WW
System Version: ThinkPad X1 Yoga Gen 5