I strongly suspect this is yet again an IK Sampletank issue. Ive tried getting ST iOS to work with Genome MIDI and other MIDI generating apps and it always seems to be Sampletank that is a problem.
Today i tried Soundrizer with Cubasis with no problem. And BS16i works fine too.
Sampletank is a pain to get to run in the background. IK need to get their act together and sort this out.
I also tried the iGrand Piano with Cubasis - and it didnt work either.
I’ve just posted on the IK Multimedia forum about this incidentally.