On examining the files in question neither were corrupted
After a reboot they both played fine
I now have another irritating problem - many Qobuz files will not play, and they become stuck until I move onto the next song. I have disconnected and reconnected my Qobuz account on a couple of occasions, but it makes no difference.
So now I have an expensive piece of software which is struggling to play not only my own files but also streamed ones.
Thanks for the update! @Mr.Flibble is correct with the above; this is a known Qobuz issue upstream of Roon that our team is actively working on alongside Qobuz. Here is the tracking thread for this issue:
Is this occurring when accessing the same file? We can see from a fresh ROCK diagnostic file that the machine is simply running out of available RAM each time it crashes.