I updated to iOS 8.1.3 on my iPad Air. Same problem. The 2nd H9 shows connected for 2-3 seconds on the iPad and then disconnects. The H9 LEDs never show a connection.
Really bummed about this. For now, I am using 2 USB cables to my PC. However, I discovered that when you do that, the pedals stop receiving inbound MIDI messages. Not a show stopper, but definitely and inconvenience.