We will report this to the developer. Can you assist us to isolate the problem with the following tests?
Qobuz:
1) CD, CD, ....., then HiRes, HiRes, HiRes, .....    Does it miss the first switch to HiRes but then locking on the 2nd HiRes ? 
2) CD, HiRes, CD, HiRes, CD, HiRes            Can't hear HiRes at all or some ?