Roku Ultra (4850X) + YouTube app stuttering >1.0x speed

Got banned from the r/roku channel for asking this simple question.

Is anyone else experiencing issues with the YouTube app when playback is >1.0x speed? The audio and video quickly get out of sync, and the playback stutters for a moment every 3-5 seconds.

I can't find anyone online talking about it, but it's happened now to 3 different ultras, one of which was brand new out of the box today.

I've tried factory resetting them all. No clue what to do other than find a different streaming device.

Is there anyone else out there having this problem?