Always helpful to post the model, software version and build number. Most Roku remotes use WiFi direct and from the sounds of it, you have a neighbor who owns one too. I'd suggest you install WiFi Analyzer for Andriod on your phone or if Apple, something similar. Once installed, it will show nearby WiFi users and the channel numbers they use on both 2.4/5 gHz bands..I'd hunt for the one that's closest, and then log into your router and change the channel number..hopefully you know how to do it
Power User (film maker)
Mill Valley, CA
Jonathan
Roku Ultra 4800R; LG OLED55B7A, ONKYO TX-NR636, Panasonic Blu Ray, Definitive Studio Monitor 450 (L/R), Definitive LCR 2000 (center), Definitive 10" sub-woofer, Definitive surrounds. Motorola MB8600 modem. Asus RT-AX68U WiFi 6 router. Western Digital Power Line network adapters