Same problem. I've only tried the Spectrum app and it fails miserably there.
Model: 3941X - Roku Express 4K+
Serial number: X01600NGRW95
Software version: 11.5.0 build 4235-CR
Device id: S07P216GRW95
Tracker id: 95-440-345
It seems like a lot if not all of the people have this problem and it's been happening for over a week and yet there seems to be no resolution to the problem. Are you working on it?