I looked again at the wiim home app while having the iFi in "App mode" and the iFi wasn't listed, so this may be my mistake (As I mentioned I don't use it that often). I am going to inquire about this next week and see what's up. I am wondering if one of the Wiim updates caused this to no longer work.
Here is a screenshot I took awhile ago to show I am not out of my mind here, and I never had the "Legacy" app downloaded or installed...
You can see this listing as A569 which is correct.
Have you ever tried anything like MConnect for streaming to the unit? It works very well.
I will update after I get some answers...
Cheers!!