Multi-route Audio issues

[Rich13]

Hi everyone, setting up BH on iPad Air 4, USB out to Midas MR18.
When playing multiple recordings, recordings 1 (click) and 2 are in time, 3 slightly delayed, 4 more delayed etc, until recording 8 is completely out of time with recording 1. Has anyone else had this issue, and if so what was your solution? Also recording labels will not save. I've raised a ticket with Arlo, but wondered if anyone else has had similar issues? Thanks🙂