Hi Eugene
this is the Eventide support forum. We can only provide advice/support for your Eventide products.
Eclipse presets have a SEND parameter controlling input level to the FX. This can be patched to external controllers, MIDI or pedlas. I can only think of:
-a MIDI CC message is patched to this parameter and it mutes some presets?
-your rig isn't configured so that EACH unit is controlled on a dedicated MIDI channel? ANY MIDI OMNI setting should be turned to OFF in all units, including the pedalboard? Always use separate MIDI channels!
– MIDI chains can be weird sometimes. It's much better to run them on a parallel routing rather than daisy chain them on MIDI IN/MIDI THRU. A MIDI Split box helps this and makes commands faster.
We'd need more details on how the Eclipse is configured though.
best
I
