With the preenfm2 filters, the resonance responds to ccs but if sent a value of over 100 it can cause the voice to "crash". It will set the resonance to over 1.00 (the max with direct control of the unit). Happens with both the hi pass and low pass filter. Lowering the value does not bring back sound, you have to reload the patch entirely. May happen with other parameters in this area as well.
I'm not sure what the right solution is, but the current functionality makes it scary to interact with the unit via my octatrack in a live situation.