If I have a track armed in my DAW and it is set to "all" for input, and I play any instrument, I will get random moments where the pitch bend will all of a sudden zero out. For a while I was puzzled by this but then realized that it didn't do it if I set the track source to specifically be the "Arturia Keylab Essential 61 MIDI in". There's a separate one for "Arturia Keylab Essential 61 DAW in". Then I eventually figured out that if I touched any of the sliders on the Keylab, this would cause the pitch bend to zero out. So this tells me a few things: the problem is not in the pitch wheel, as I originally had feared, and it specifically relates to the sliders, and that this information is coming through the "DAW" part of however the Keylab communicates.
What it doesn't answer is: why are these sliders specifically sending pitch information? I even opened up the control center where you can set what each control does and set those sliders to transmit nothing, and it *still* does this. I don't really use the sliders for anything currently, nor any of the other DAW controls - I basically just use it as a keyboard. But someday I might want to use the sliders and then I'll have to figure out why they're sending pitch data in addition to whatever else they're supposed to be sending.
Anyone have any insight?