Been playing around with Fedora 34 (kernel 5.13.5) this afternoon. I noticed a frequent cursor lag (mouse freeze). It happens every couple of minutes or so. This only happens under Wayland, and not X.org.
After some research, it appears that you can fix this by adding “i915.enable_psr=0” to the kernel parameter. After this change, the weird freeze went away for me.
Alternatively, you can also fallback onto X.org.
Some references:
https://www.reddit.com/r/archlinux/comments/gu0a8a/psa_solution_for_random_freezes_with_intel_igpu/
https://bbs.archlinux.org/viewtopic.php?id=268244