I just got the HD500x a couple of weeks ago.
Here is one of the issues I am having.
I've created 4 patches for performance mode.
The patches are on F6,F7,F8,F9
F6 and F7 are set for rhythm tones
F8 and F9 are Lead tones.
If I switch from either of my Rhythm patches to patch F8 (Lead tone 1)
Then All is fine.
However if I switch from either rhythm patches to F9 (Lead Tone 2)
Then Lead Tone 2 has a drop in volume from what is programmed.
Now here is part that does not make sense.
If I go from F8 (Lead tone 1) to F9 (Lead Tone 2) then F9 comes up as the correct volume with no issues.
All 4 patches are programmed for the EXP 1 to control Volume .
(I've installed the latest Flash also.)