Hi Malcolm, I can only repeat that we have to wait on response from Qobuz side; it's not my place to reveal their inner technical workings and i would hope for the same courtesy from them if the roles were reversed.
We did a couple of initial remote sessions with the problem was first reported, but we were not able to resolve the problem, this was a process of investigation and diagnosis which led us to the conclusion that we're at today. In fact, i can tell you that Innuos were, i believe, the first manufacturer to report this issue to Qobuz - it took other brands much longer, but when they did it confirmed our findings. It is thanks to the quick feedback on this forum that we were able to relay back to Qobuz so quickly, so we appreciate the quick input from the community here.
If this were more of an Innuos 'in-house' issue there is probably a lot more i could say, but sometimes these situations arise when third-parties are involved. As mentioned before, I will report back as soon as something conclusive reaches me, but there simply has been nothing new to report this past week or so.
In terms of a pattern of affected Innuos equipment, the only one that I am possibly aware of is that you might not be affected if you only have a small amount of favourites, perhaps a few dozen albums. In that scenario, you might not be affected.
The only workaround for now is to go to Music -> Qobuz tab at bottom of page -> scroll down to bottom view your Qobuz Favourites categories. From what i understand, these should still work and display everything correctly, and if you add new favourites on the Qobuz app itself, they should be displayed here in Sense.