Yes, I'm pretty sure.
I guess there is nothing to fix without the full package of the involved devices; sad.
I was talking about the reverb included in the amp-sim of the Wurlitzer and the FX x/y on the Jupiter.
Example: Turn down any accessible FX, decays and releases on the UJ Lead EG of the Jupiter until you hear just a click. It still has delay and reverb on it.
My expectations regarding an instrument simulation are rather completely dry sounds in order to process them in the way I choose.
In other words:
They are useless if you want to do more with them than impress users stepping through presets. Anyway- there are many sounds left, it could be worse :-)