I've started having this really weird issue whereby when I open iPhoto, or have it operating and opening photos when my laptop is not connected to a dock and external screens, the mouse cursor jumps to the bottom left hand corner of the screen, and freezes for about 10 seconds or so. After which I can then move the mouse again.

But it continues to happen opening subsequent items, too. 

It only seems to occur when I am using iPhoto but no other application yet from my experience.

Has anyone else experienced this?

Macbook Pro 14, M1 Pro