ya.. its not 'our' bug. :p I Think this one is the same as in browse..
Its really weird, and it was kind of freak luck, that i found the reason/solution
In the bottom of the screen, you find a check-mark box for
'Show PADsynth Status'
toggle that on off
suddently all instruments are shown
The 'reason' is the zasfx update of 1.x
btw.. the x.9 'releases' are only for bughunts and tests