Some Midi Mappings Dont save
I have a patch that is almost all b-patchers and I am mapping a bunch of stuff to my MIDI controller. When I close the patch some of the mappings get lost but others dont even when I save my mapping to file in the Mapping Advanced Settings. Its possible it has something to do with pattrstorage but im not sure why that would be affecting it.
It's probably not an answer you want to hear, but it's better not to rely on automatic mapping features. It's never really been reliable, and not just in Max.
With your own mapping scheme you have everything under control. For example, [coll] is very suitable for this. For multiple use in the patch possibly named [coll] or [coll] with [grab]. With text files, [coll] also allows different setups and/or external editing of assignments.