I have a H9 and a core also that I use with the iPad Air.  Mine will connect to both most of the time.  I can sync up either one relatively quickly but adding the other one,to have them both synced, can take a bit of time for the ipadair to see the other. It will say connected on the air but the blue light wont light up on the 2nd pedal.  If I leave it alone for about 2 minutes it may see it.   Sometimes it works, sometimes it doesn't.  Also it will just freeze the iPad sometimes and I have to start all over.  I've just been putting up with it but thought I would chime in.  All versions of software are most recent.