The first post, it was a noise on all INPUT channels ?
Did you record 12 input channels from the 12Mic ? Or also some input channels from the UFX ?
And the exact same noise happened on all recorded files at the same moment ?
Have been FX from Totalmix involved ?
I tend to say from a guess, it can be defective UFX, you may try a recording of all input channels from the UFX only (MADI disconnected), try to reproduce the failure without the 12Mic.
The second post, same question, wich channels was involved in the recording ?
The fail did happen exactly at the same position same duration ?
It can be the MADI connection is defective. Try a test, do a recording with all 12 input channels from the 12MIC and additional a few channels of the UFX, let's find out where the issue appears, in the MADI inputs or the UFX hardware inputs ?
Also include a few loopback signals from Totalmix.
Try also a DUREC recording at the same time to see if the fail is recorded there as well, to ensure it is not a DAW fail.
M1-Sequoia, Madiface Pro, Digiface USB, Babyface silver and blue