Does this issue only happen with TIDAL/Qobuz content? If so, do you still have an active subscription to the service? 30 seconds could indicate that your streaming account expired and it is only able to play short samples of tracks. I’d also check to see if it occurs on other zones such as your laptop’s System Output zone (the internal speakers).
Happens with any content Noris. I’ve had it since day one with the LSX. It will be happily pounding out the tunes for hours on end then suddenly it will stop. Pressing play on Roon you get the message that Roon has lost control of the audio device. Could be a Qobuz issue, could be network issue, could be a momentary loss of internet conn. I’ve not digged on it as a simple ‘restart’ of the LSX resolves the issue.
If this behavior only occurs on Qobuz content, I’d check to see if the Qobuz web player (play.qobuz.com) exhibits the same 30 second issue. Also, would be good to check on other zones as I mentioned in my previous message.