I have had several contacts with both Qobuz and Bluesound over my issues. BT diagnostics tell me I have no problems with my broadband service and certainly I don't notice any other issues streaming netflix etc. Qobuz offered little advice other than to use their own app, which obviously is no help with a Bluesound player as the two are not compatible.
Bluesound went through my set-up, and wanted me to change my DNS lookup address. (I'm not very technical but I tried). BT home hubs don't allow such changes (Probably to stop idiots like me messing it up). They wanted to know if my ethernet cable was any good (I swapped to wi-fi-max indicated signal strength but it still buffered so back to the cable) and lots of reboots of router, node, factory resets, uninstalling the app etc etc.
Qobuz still won't play a whole album without stopping at least once.
Meanwhile, Amazon unlimited (with its awful Bluesound navigation and layout) just carries on working hour in hour out.
I pointed this out to Bluesound and they replied that I may want to consider changing streaming provider if Qobuz is unreliable...
I have 9 months Qobuz subsription remaining, which may prove to be wasted (lesson learned monthly only in future for streaming)
, and I may return the Bluesound Node2i as it is under extended warranty, to see if there is a particular Bluesound-Qobuz issue.
But yes to answer your question, as far as I can see, Qobuz has been broken since mid January.