It was fine, until yesterday, the restarts started again and now I'm experiencing one after another, so I would say it was an temporary fix
Actually, I tried to do that fix, and after I connected the battery connector, I tried to power on the phone but it doesn't start, I left it for few hours then it started by itself, and I still encounter the same random restarts.
Opening the back cover and tightening the battery connection fixed my problem.Hi! It's unlikely, IMHO, since my phone reboots too, but it's of ~room temperature, no signs of overheating. Maybe, it's thermal compound bug/lack, but unlikely.
At 4PDA, I've counted around 10 people having the same reboot issue. I've asked some of them here, but we don't know the reason for sure. 4pda.ru/forum/index.php?showtopic=904618&view=findpost&p=101416402
So, still guessing. One of them said that After downgrading to android 9.1 and resetting , her phone runs just fine. That trick does not work for me...
Important note : for the cases I've seen, it has started ~within 2 months (around Sept 2020)