I have the Roku Ultra. I have had it since shortly after the Ultra was introduced. Lately, it has become very sluggish in it's response to the remote. A reboot fixes this, but it is annoying to have to do it at least daily, sometimes several times a day. Not infrequently, it will spontaneously reboot while I am watching something. It has become an increasingly unstable device for me (I have the latest updates). Anybody else having problems with the Ultra?
Can't say it's been a problem with mine. I might go weeks without a reboot. The only time it's rebooted is a firmware update or loss of commercial power. That hasn't happened in a long time. . In fairness, it isn't used heavily, but it can sit there untouched for a week and works just fine when I do use it.
Dan Roku Stick (3600), Ultra (4640), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.
Do you have an MicroSD card inserted into your Roku? I have had the odd issues where my Roku got buggy due to the MicroSD card getting corrupted. And a weird issue i have noticed with my Roku making the Remote sluggish is, for some reason if my Android box is not turned on while i use my Roku i can't use the remote. I either have to turn on my box or unplug the power source from it for my Roku remote to work properly.(Freaking Weird issue)