I had the same problem. I manage to solve it in this way:
-Go to Intel Graphics Driver and disable ALL options related to battery saving, such as Panel Self Refresh. -Shutdown and then boot the laptop again.
I thought this solution because I've noticed that touchpad starts to lag/freeze only when using Intel UHD gpu. This never happened to me while playing with RTX 3050 Ti. Until now (3 hours after I changed the mentioned setting) the touchpad works perfectly