Footswitch control of Ableset web client on a tablet

Hi Leo, I’ve downloaded Beta 16 and test flight Ableset Connect to my (rather old) iPhone 12m on iOS 26.5. Most normal functions of Ableset Connect are working fine, as are things like sending a cue light. Unfortunately even though I have Midi Forwarding turned on and it shows ‘connected to , when I open Settings: Edit MIDI Mapping: add new mapping from any MIDI device, it doesn’t detect incoming MIDI. I have a teensy-based MIDI Note sender button connected to my iPhone via a Lightning Camera Connection Kit adapter, and if I use Midi Scope app on the iPhone, it’s seeing the MIDI Note messages from the teensy coming into the iPhone OK. Is there any steo I’m missing? Cheers, nick