Tested in AUM and Logic Pro, after reopening project all MIDI mappings are gone…
Steps to reproduce:
- Open Mariana AudioUnit in AUM
- Go into Mariana Settings → MIDI Control
- Enable “Map MIDI”
- Map some parameter (e.g. Output Volume) to some MIDI CC
- Press “X” to disable MIDI mapping (after that sending MIDI CC changes parameter)
- Save AUM project
- Reopen AUM project
After that all Mariana’s MIDI mappings disappear…
Anyone knows how to report this bug to Moog? Is there any chance that they read this forum? 
So, problem was reported to support 3 months ago… and bug is still here unfixed. Synth is still unusable.
Sadly, but this is the service you should expect from them nowadays… 
Have you reached out to our support channel on this front?
https://www.moogmusic.com/support/
So, after 4 months of waiting… bug is still not fixed, app is unusable
So, after 5 months of waiting… bug is still not fixed, app is unusable
I just bought this app and tried out with LoopyPro, and I can confirm the bug on reloading the project, when setting to load mapping from preset is unticked.