I don’t know. This doesn’t sound like a power supply issue. Sounds more like a boot loop to me. I’ve not seen other reports like this so this is new to me. I’ve had the stuck logo happen to me once but I was using adopted storage with a usb drive that wasn’t formatted properly. A firmware reset and redoing the adopted storage fixed it.
Having this happen on 3 different devices is the troubling part. If it was hardware, I can’t see it happening on 3 different models and only to you. To me that points to some specific type of crash causing this behavior. If we can stop the crash, then we can avoid the problem. Have you checked your PMS logs after one of these crashes to see if PMS registered anything?
To test if PMS might be the cause, I would first turn off anything that runs automatically to rule out a background tasks. That would be the butler, automatically update libraries, automatically empty trash, and any media optimizers or sync jobs based on a smart playlist. See if things stabilize.