Heads up about successfully mapping Midi Hold
So it seems that the new Midi Hold functionality is detecting the time between CC Value 127 and CC Value 0. Unfortunately, my midi controller (FCB1010) does not send CC Value 0 on release (Only CC Value 127 when pressed). So ALL of my Midi CC Ons are interpreted as Midi CC Holds.
I resolved this by sending Midi Notes from my controller (which intrinsically send Note Offs).
Thought this'd be useful for others.