My 4th gen Apple TV keeps shutting down lately. Also, sucks in general.
Anybody else been experiencing random shut downs?
This probably won't help you, but my ATV4 used to randomly shutdown all the time, this was in the first year of the ATV4 launch.
Over time, updates seem to fix the issue, but it was really annoying when it was happening often.
Telling my ATV4 experience on the MR forum, I notice that there was a huge inconsistency in user experience of the then new ATV4. So, while you are experiencing shutdowns, many people will say their ATV4 is running great.
It is probably tvOS 11, and hopefully it will be fixed for you in an update. I noticed a lot of bugs that came with tvOS 11, some where already fixed for me, and some are still around.