I use an OT with an iPad, with Aum and synth apps.
The OT is driving the synths in Midi and i don’t need Midi Link since they’re launched in Aum and synced with the OT clock.
I tried recording once within Auria Pro and did not have problem. Transport and Clock were fine and no drop on iOS 11.3.1.
I had do make connections trough the Auria Matrix.