SUMMARY
In the clipboard settings, if you enable the option that automatically copies anything you select into the clipboard and copy something from — what I suppose — is an XWayland application, when you hover your cursor into native Wayland stuff the cursor turns into an X and does not register any clicks for about 3 seconds.

STEPS TO REPRODUCE
1. Enable the option that copies your selection to the clipboard into the clipboard settings
2. Copy something from an XWayland application
3. Hover your mouse over something native under Wayland

OBSERVED RESULT
Your cursor's icon turns into an X and stops responding to clicks.

EXPECTED RESULT
Your cursor does not change and you can click without any problems


SOFTWARE/OS VERSIONS
Operating System: EndeavourOS 
KDE Plasma Version: 6.3.0
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
Kernel Version: 6.13.2-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-8565U CPU @ 1.80GHz
Memory: 11.6 GiB of RAM
Graphics Processor: Intel® UHD Graphics 620
Manufacturer: LENOVO
Product Name: 81S9
System Version: Lenovo IdeaPad S145-15IWL

ADDITIONAL INFORMATION
I don't know the name of the option that syncs your selection with the clipboard because I do not use my system in English, sorry.