I’ve posted about the gapless issue in the Qobuz thread linked above.
I got tired of waiting for a fix from Roon so I subscribed to Tidal.
The gap problem exists in Tidal too 
Quick recap: This is a recent development.
I’ve had Tidal in the past and it was gapless.
Qobuz was gapless until about mid December.
All my endpoints support gapless playback.
Gapless still works with DLNA, the Tidal and Qobuz apps, and with local files in Roon.
It’s very random for me. It happens with both 16/44 and higher res. And not always. The same album will play gapless sometimes and not other times.
Edit to add: There are also albums that should be gapless that never are.