could you try the following procedure, please, it takes only a few minutes.
1. Assign a footswitch to <next program>
2. Assign a further footswitch to <previous program>
3. Connect the foot switches to the H8000FW and try to make some program changes.
4. Let me know what you see.
I would appreciate very much if you try this. I have called Eventide helpdesk but for whatever reason they seem to have forgotten this issue.