I know this has been discussed somewhat here and there in comments. I just wanted to let folks know the strange issue I had just in case they run in to the same issue.
I have an Onn 4K Box and it was flawless for weeks.
Within the past week, I was getting weird reboots and freezes all out of the blue.
Now my box was powered by an Alcatel AC to USB adapter rated the exact same as the one included with the Onn. (The included one had way too short of a cord for my setup).
Even though the AC Adapter was never used before, changing it out for a Motorola AC Adapter (again same exact specs), strangely fixed all issues.
So I don't know if some adapters don't really put out 1A or if even new adapters can start to konk out.......
I was having restarts on my tivo 4k until I switched out the 1a block it came with(!!) to a 2amp one. No problems since. Good tip!