This may not directly involve Canon but someone else may have the problem with Elements and Canon's Print Studio Pro [PSP] and might offer a solution. When I use PSP and hit any key on the keyboard by accident after making a print, Elements freezes and I have to Force Quit the app which means losing all the editing, if I failed to save it. I have noticed this on Intel based and M1 based Macs. I have asked about this on the PS board but have received no response; I am hoping someone here may be able to suggest a reason this is happening. Thanks.
I am using Elements 2020 (18.0). Today I had the same problem come up and I exited Print Studio Pro and found that Elements was still alive; I didn't have to force quit. So it could be that PSP itself is the issue. That workaround may be fine or not. Time will tell.
Thanks for helping.