My apologies for not replying sooner!
My set-up consists of:
13in MacBook Pro running 10.14.6
Gig Performer 3.6.1
Arturia Keylab Essential 49
Arturia Keylab 61 mkll
VST’s from Arturia, East and West and Steinberg.
The issue: After not using the set-up for a few days, I noticed that the sliders on the keyboards would not respond, and would have to be reassigned in the rack editor mode. Also, volumes in the Arturia VST’s themselves would be set to zero.
The problem presented itself again last night. I unplugged both keyboards and after plugging them in, the situation corrected itself. I’m using my set-up right now and did run into any these problems.