Possibly related... (or not...) PX Version 2.2.0.0
I just tried switching programs on the PX from its front panel, via USB with Local Control Off, and running through Logic Pro X. After a few changes, the PX seems to stop responding to all incoming MIDI over USB. Everything - notes, program change, etc.
Switch back to Local Control On, and front panel of PX works okay. Switch back to Local Control Off and no joy.
So go back to PX 2.1.1.0.0 and everything works as expected, just like before.
Something fishy about USB under PX 2.2.0.0
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Oops! Now same behavior with PX 2.1.1.0.0 -- looks like changing program too rapidly on the PX front panel, via local control off, over USB to echoed MIDI from Logic Pro X, causes the PX to stop responding to all further MIDI. Same behavior as seen with PX 2.2.0.0.
I see the MIDI being sent back the PX by watching MIDI Monitor. But the PX is deaf to all MIDI - program changes, notes, bank changes, etc.
So - going back to PX 2.2.0.0 and will take care not to change programs too rapidly...
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Wow, it has been a while since trying to use the PX in anger. It has just become completely unusable from within Logic Pro X. It isn't just a matter of switching programs too quickly while Local Control is OFF and being echoed back from the DAW. It is a matter that some program changes cause the system to just go deaf thereafter. All incoming MIDI over USB becomes ignored. But you can play the synth as a standalone just fine, with Local Control ON.
I haven't yet tried a real MIDI interface instead of the USB port...
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So here's what I know so far...
After some particular Program Changes, the USB MIDI IN port on the PX becomes deaf to all MIDI. The PX still transmits USB MIDI as usual, it just doesn't receive any USB MIDI IN, no matter the source - PX keyboard, external keyboard, recorded sequences. The PX remains responsive under Local Control.
Restarting the PX fixes the problem, until it arises again after some particular (as yet undetermined) program change.