Midi messages on start

AUM does state saving. IAA apps do not state save. This is why you have to reload the patch everytime you open that project file.
AUv3’s will save the state, patch, setting, etc of the synths in the AUM project.

Unfortunately, most of AUv3 do not even load on my old iPad. I posted some time ago about that as it results in a « communication error » issue.

I disabled PC send and switched AUDIO CC OUT to INT.

Hard to say if it is the right patch loaded and not just the CC values which are messed up.

Prevent from mute CCs send, not midi tracks CCs send.

You can deactivate each CC in Ctrl 1/2 pages…

Send only PCs at first.

Just for testing purpose?

Cause the point is of course to load CCs at same time.

Yep. Because of this :

Add CCs once you have identified clearly the problems and their solutions…