Hmm… I have not tried this with the bank buttons enabled. I’ve only used the 3D in single bank mode and it works as expected. I can try this later and report back.
Hey man, finally got around to testing this for you. Unfortunately, I wasn’t able to repro your issue and things seem to be working as expected here.
4 banks enabled, all send MIDI functions in HID mode are DISABLED, and they do NOT send MIDI at all in Traktor.
I would try re-updating the firmware on the 3D (it will just re-apply the firmware), disable the send MIDI commands in HID mode again, and click send to MIDIFIGHTER. Make sure the flights flash when sending the data to the MIDIFIGHTER.