Hello @Asathor,
Sadly this is quite a big issue for now for me. I cannot succeed in having a correct quality for all my Tidal tracks added to my Plex library. In the best case they show AAC320kbps, but when I get FLAC (because the tracks encoding is compatible with Plex, which means no MQA) music is of very poor quality. See here for a small description I’ve done of the issue I encountered. If you find a solution, I’d be happy to ear it 
