Same issue here. 3x Roku Ultra 4660, only 1 has this issue which we began noticing on 3/31.
This broken functionality does not seem to be associated with a software version or update. I think this is a bug. If this is part of roku removing the functionality can someone official please say so. I must figure out a solution for my mom and waiting here with silence from roku is no solution. My next step will be to attempt an infrared transmitter to accomplish the same tasks. If roku feels they must remove this functionality to stop 3rd party applications from taking away eyeballs from their internal method of promotion then maybe they can require the functionality to be enabled in a secret menu so that this one extra step makes the widespread use of a 3rd party app significantly less likely.
I do control4 I made an ir driver for just navigation and in programming I tell mini apps to swap to my driver instead of roku IP driver for navigation for the time being it’s working fine a little clunky if you press buttons too fast it keeps scrolling for a few seconds but it’ll get people by for now
