Roku TVs can experience several power issues:

If you experience any of these issues, there are a number of solutions you can try.

There has been no official explanation from Roku or the TV manufacturers themselves as to why this might be happening. Officially, however, it does seem to be related to some sort of driver update.

There are troubleshooting tips from the Roku community, but some may require you to completely reset your TV. This can be frustrating, as you have to sign back into all of your accounts and set everything up the way it was before. So try the easiest methods first, as this will save you from having to reconfigure everything after you fix the problem.