I have updated both H9s last week to the latest firmware, and had been using it several days last week without any issues. But today, there are suddenly connection issues.
What is going on with your product, Eventide?!
OK. I found the cause. I had not plugged in my Expression controller that sends out MIDI signals, so the jack of the cable rested on a metal case, causing the MIDI controller to send out a constant stream of MIDI messages. Once I had unplugged this cable, everything worked fine again. Phew!