I have two T4's left on their charging bases in one room

Noticed that one of them goes to sleep (screen goes blank) even while on the powered base, and sometimes reboots when I wake it up: I have seen other similar reports

Turns out it is the rear battery cover on the T4 that is causing the issue: if I remove the cover the problem is solved (moving the T4 side to side with cover on helps too, but not consistently): you can charge and operate the T4 without the cover but I would not recommend it

Anyone else still having this problem?