It has to do with a bug between Windows 10 and Source games I'm pretty sure. Back when CS had problems with it, the fix was the same. Having dealt with the problem of Apex crashing for about a week on Alt Tabbing, and then remembering the CS go problem. My crashing from Alt-Tabbing is cured.
Below are the steps on how to fix the crashing:
- go to Focus Assist Settings
- turn off all the automatic rules
Fixes my errors and also my friends.