Hello,
I just update my Mofactor in 5.2 and now I have the following issue;
I use a  Voodoo Lab Ground Control Midi controler, when it send a change to the ModFactor
for a Factory Preset all works perfectly (as with my previous version of the MF os the 3.5).  
Now, when the controler sends a change for a Modified Preset,  that preset is loaded but not  made Active (the MF is in bypass mode). This is in particular the case with all my User Presets!
In fact if a preset is modified and saved the problem appears.
I carefully check the parameters but I probably miss something?