I am very frequently having this problem - 8th reboot tonight because the remote just stops responding, or the wifi just won’t connect. Super frustrating - oh look, just got wifi to connect and the remote isn’t responding again. Literally while I wrote this message.
My problems with the Roku itself & the remote, continued for some time. I am still not too sure of the reasons, but one last thing that did make a difference was “properly” factory-resetting the router. That is, holding the reset button for a full 30 sec instead of just a quick in & out. This seemed to have resolved the issues the last time. I have not been back at that exact Roku/TV/Wifi setup to confirm but the time it worked, it lasted a few weeks.
