So- even when my H90 has the presets bypassed- when I put the pedal into the signal chain (via my Crocodile Tail Loop) my signal gets a significant volume boost. This still happens when there is nothing else in the signal chain except the H90. Is there a way to adjust this globally so I don’t have to adjust every preset individually?
This does not sound like normal operation. Try putting two THRU utility algorithms on a Program. When you bypass the H90, there should not be any apparent drop or increase in volume. If you do experience that, I recommend conducting a factory reset. Before you do, back up your Programs to a list and record any system settings.