Yes, they are pretty much overworked:
Though I wonder if this is rather related to an app update, or what @TobiasF mentioned, about an GMS update. It seems pretty suspicious that the issue occurs suddenly (and not right after an FP OS update, moreover with different FP OS versions), yet around the same time for many users, and still not for all users. This makes me suspect that maybe the root cause is not connected to Fairphone/ FP OS after all.
Did anyone try to make a logcat of the problem? (I can’t, since I am not affected. Yet?)
Edit: on the other hand I don’t find this problem when searching for it online.