Is it possible the Shield is overheating?
No. Unfortunately, I checked the temps over ADB and they were fine. I actually repasted them and like speed wise they're running great.
The problem is it's two Shields, so it's a 2017 and a 2019, both behaving the same way. I tried an Apple TV and it was fine, but I hated it so I returned it, but considering I can't get the shield to work, either Shield, I'm just going to get another Apple TV, I guess.