Re: Roku Ultra always has to be unplugged/plugged back in to work
On some Roku models, Roku 10.5 introduced some new power management options via menu path Settings > System > Power. My Streaming Stick 3600 is the only one here that has received Roku 10.5 so far and it did not get the power management options, so I'm lacking details. I believe there is a setting there that will prevent your Ultra from powering down.
Roku Community Streaming Expert I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well. If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X