Qobuz stops playing via Roon.

Appears it's very temperamental yes.  

Testrun you may be absolutely right.  Everything you mention could be the problem.  Think I'll start with the desktop as the core 1st and proceed from there.  Currently my core is the laptop which isn't hard wired. 

My Core is in the kitchen which joins the living room so about 15 feet away. 

Also I should add that I rebooted laptop, router, LUMIN and iPad.  Started working better but then each song would stop about 75% into each track. Haven't screwed with it since.  I'm going to give it a little more time and if not better Roon is toast. Sick of messing with it and should be a more robust or simpler software in my opinion.  

Oh sorry.  HP laptop with a 1TB hard-drive. My iPad and phone work just fine as a remote.  I do have a Wi-Fi extender for the LUMIN so do you think I should try to connect to it instead of the router? 

Laptop isn't hardwired to the router. Maybe I should download the Roon software to the desktop which is but it's in a bedroom that's just off the listening area. Thanks in advance for your help :)

It’s very frustrating because my download speeds are 40 mbps. Have plenty of bandwidth for playback. Think I’ll try and download Roon on my desktop which is hard wired.

Hard wired my laptop and so far so good.  My desktop couldn't run the Roon software as its too old evidently so inserted the laptop and all is well.