OP-Z USB to iPad connection won’t do MIDI

I noticed that, when using AUM on the iPad and connecting the op-z to the iPad using the camera connection kit, op-z shows up as an audio interface and no longer offers midi routing as an option. I just want op-z to have a midi connection over usb in this setup, no audio routing.

The only way I’ve been able to work around this is if I connect op-z to my iConnect midi usb input and then connect the iConnect midi interface to the iPad.

It would be great to have a way to turn off the default audio interface functionality when connecting the op-z on the iPad. Does anyone know if there’s a way to do this within op-z settings? I scanned a recent version of the op-z manual and want able to find anything for this.