Android TV - issue with DTS HD via ARC

[bardian]

I was looking at the release notes of earlier versions of the Android TV Plex app

Plex for Android

Plex for Android 6.5.0 Available on Google Play and the Amazon App Store, or download the APK: armv7a, arm64v8a, x86 (Plex Pass required). NOTE: We are performing a staged rollout, which means the update may take a day or two before it becomes available. WHATS NEW: Local Playback: support for sidecar SRT subtitles. Local Playback: support for resuming last playback position. Local Playback: performance improvements opening preplay pages. Use the Android TV app on any device where the TV lay…

and it says the following…

• Allow fallback to DTS Passthrough when DTS-HD / MA not supported.

Clearly not working…
As described above, PMP on mac is working fine, Plex add on for Kodi works fine, Android TV app doesn’t.