FLStudio v20.0.3 [build 532] 64Bit on an updated Windows 10 PC.
As mentioned, the keyboard is the "SL88 Grand", and I tested the keyboard using Keyscape (as that is what I need the pedal for).
I've tried ...
FLStudio
When I press my PC's keyboard button to play test a note it plays fine, but If I continue holding it it starts playing it rapidly over and over instead of sustaining it (This happens in any plugin ...