Well that did the trick! 
I rebooted about 12 times without issues. Oh man, easy fix. 
Thanks!
I told myself that touching the kernel is forbidden because using the lts version is @dalto’s #1 issue-avoidance rule (How to run a stress-free EndeavourOS). Well, I’ll stick with stable for now. The whole desktop even feels faster and more responsive. 
Thanks a lot! 