I can know say, that JP8 in studio One 3 give extremly high CPU spikes when using the modwheel.
As it is not happening using the modwheel with other of the synths (except with Analog Laboratory in some degree), and as the same picture appears in Analog Lab only when using the JP8, then it somehow must be something with the way JP8 is build.
I hope Arturia will correct this important thing for the next update, and the update will come soon.
BTW: I have the latest update from yesterday, and it's the same.