I happens the same to me, no matter if it is X11 or Wayland session. Random freezes 3-10 seconds. My machine is Lenovo Yoga with Intel integrated graphics:
00:02.0 VGA compatible controller: Intel Corporation TigerLake-LP GT2 [Iris Xe Graphics] (rev 01) (prog-if 00 [VGA controller])
Subsystem: Lenovo TigerLake-LP GT2 [Iris Xe Graphics]
I use KDE Neon distribution. On Plasma 5 all works fine.
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