Same issue - is there a fix? Rebooting re-pairing, etc. didn't work. Re-pairing did fix the find my remote feature which broke around the same time. This is pretty clearly an update issue if this many of us have the same problem w/the Roku ultra's voice commands.
Thanks for letting us know all troubleshooting that you've done and we'd like to gather more information about the issue you're running into related to your Roku voice command. Can you please provide us with more specific information about the issue you are experiencing?
Can you also please provide the serial number/device ID on your Roku device?