Hi,
I'm using two H9's and I uses the second one to control the tempo on both H9's. I change the tempo for instance for the delay's of the 1st H9 to follow the "master" tempo. This works nicely although the 1st H9 has some audible artifacts when syncing the tempo to the other one. So far so good.
I'm using the 2nd H9 mostly for reverb and ambient stuff. I have some reverb presets for Hall, spring etc. that should have a fixed setting of decay. So these presets shouldn't change when the tempo is changing. The issue is that the second H9 changes the decay of reverb presets when Tempo is NOT ON when using Tap tempo! This is not what I want.
For testing purposes I reversed the presets so I activated a delay preset on the 2nd H9 controlling tap tempo and a reverb preset on the 1st one that should follow the tempo. If I now use tap tempo on the 2nd one the tempo is NOT synced to the 1st one that has Tempo OFF. It ignores the midi clock and the decay of the reverb preset is NOT changed. Global tempo is OFF on both H9's BTW.
Can you please try if this is reproducable?