Hello,

It would be best to isolate the H90 from the rest of the MIDI chain and work with a simple setup for troubleshooting.

It sounds like the ES-8 is the MIDI brain of your setup? Can you try connecting that directly to the H90?

If you are sending MIDI clock from that device, you need to make sure the H90 Clock Source is DIN in system settings, and Tempo Source is MIDI Clock in the tempo menu.

You should see the tempo follow the BPM of the device it is syncing to with these settings.

For PC/CC messages, you can try setting Receive Omni > On and sending a PC should load a new Program without any further configuration on the H90.

Please try the above suggestions and let me know what happens.