No, problem occurs only if streaming quality is set to Max in service settings. When set to High, the same track plays without an issue, obviously with 44.1 kHz/16 bit then. With Max it shows the higher resolution in the signal path as expected - just the track stops playing after around 7 seconds and doesn’t seem to recover.
FWIW, German translation of streaming quality level Max. has an unnecessary ‘.’ (dot) at the end - it should IMO be the same as in English - Max (without the dot) as this is what Tidal calls it. I’m assuming the intention was Max. as abbreviation of Maximum like High vs. Hoch (I would also prefer to us the English term High as Tidal does and not try to translate it).
Or are you planning to remove the sound quality option soon anyway as Tidal doesn’t seems to make a difference in their customer accounts anymore?
Apologies for the noise! Have you turned it off and on again? Should have waited to open the ticket after rebooting my Atom. Turned the device off, disconnected it from power and let it boot up again - it now plays hires as expected, without stopping the playback as before. I’m now good - case can be closed.