Carried out a factory reset on my h9 today, but the problem persists.

As we have already established, the default change map should read, 0:1, 1:2, 2:3. etc. and it does. However, the h9 is still ignoring it. 

For the purpose of this test I changed the map so that an incoming midi change number of 9 should give me preset 33, it did not, it gave me 9.

I’ve reached the limit of my twenty years of midi mapping experience and must confess that I’ve never encountered a problem like this. Compared to some midi devices I feel that the h9 is simple and straightforward to map, particularly because of the h9 control app for the computer.