FLStudio Envelope Controller Plugin does not update envelope graph if ADSR values are updated tweaking ADSR knobs (as opposed to tweaking ADSR control points on envelope graph directly by dragging them with mouse).
During tweaking after (any) ADSR knob ...
FL plugins (and able to be remapped by the user from within the plugin), that would allow for each note to have its own unique envelope (for pitch, volume, cutoff, you-name-it).
Some people might say, "you can do that ...