I’m having this exact same issue and in fact I posted about it last night just before you did (No audio from 4k HEVC Main 10 HDR playback (not DTS issue)). I can confirm that ticking that DTS is supported in the audio settings does in fact make it work again when you select the DTS track for playback. This makes no sense though as the TV doesn’t support DTS and I can see in the dashboard that PMS is using Direct Play!
What’s more, after the reset the AC3 audio still doesn’t work!
I’m so confused!
