I've got an older iPad, with a powered hub, and a Nektar Midiflex-4 MIDI interface.

I've got two outboard synths connected to the Nektar, ports 3 and4, each on channel 1. I set the channel mapping using the MIDI input/output menu.

When I go to rename the tracks, the MIDI mapping breaks, and the channel appears to output on all ports. The Nektar switches to 4-output mode (from 2-in/2-out), and the data from that channel seems to be duplicated across all 4 ports.

If I quit and restart, this seems to be fixed. But if I even open the rename dialog, the mapping returns to all 4 ports.