Thanks for your post.
We appreciate you letting us know so we best assist you. May we ask what type of Roku remote you have, a simple or voice remote? If you have a voice remote, aside from restarting your Roku device, have you tried to reset the remote?
You can follow the steps found on this link on how you can re-pair your voice remote to your streaming device
Still no success after troubleshooting the device? Please let us know along with the serial number of your Roku device paired to your Roku remote. Its serial number or device ID is printed on the bottom or back of the device. K
Keep us posted on how it goes.