ob6 cannot disable param xmit for LP FILTER jack input (bug?)

ob6 cannot disable param xmit for LP FILTER jack input (bug?)
« on: January 16, 2021, 10:36:29 AM »
with OB6 firmware 1.5.5, i'm not able to disable emitting (usb) midi CC messages when using an external LFO to modulate the LP FILTER (from 1/4" jack input on back of OB6).

i've got 'Param Xmit' set to 'OFF', so i would expect all param change emissions to be silenced.  The only way i can seem to get the messages do go away is by setting 'MIDI OUT' to mid ('Nid'), but that breaks all output my USB midi environment.   (of course) when modulating at higher frequencies creates a storm of midi messages.

Is this a known issue or is there another way to fix/work_around??