Having similar Issue except audio for ATV is fine through the TV built in Speakers, but no audio when using Roku app personal listening
It's the only channel having trouble with
Anything else I can try besides what was previously posted for original question ?
You didnt mention your firmware version (and looking at your post history, I see you have two different Premiere models listed: a 4620 and a 3920).
I QnD (quick and dirty) tested the Remote app (version 188.8.131.528518) on several Android devices and on several different Roku models to make sure it was working properly with the ATV app (version 7.0.126), and discovered several issues (including your issue and a few others).
2) Open ATV app & Roku remote app, use headphones mode successfully (with audio)
3) Close ATV app, change the audio setting back to Auto detect or Auto passthrough (depending on model).
You should also report this to both Apple and Roku (this leans more towards an ATV app issue, considering other issues with the most recent ATV app update) - be sure to include your firmware version and app version:
P.S: Close game against Villareal - Tuchel has increased his cachet as a tactical genius/savant with his Kepa substitution for the shootout - Chelsea has both the Champions League Cup and the UEFA SuperCup, and just missed on the FA Cup. Lukaku coming back is interesting but necessary...hopefully he fairs better than Werner especially...