Double Fader with two controller addresses.

I am attempting to setup a horizontal fader across two Stream Deck buttons, however I wish to control Zoom In and Out (controller 16 and 17) on the same pair with just one fader button.
I accidentally got this to work once but cannot seem to replicate it now.

If you have got that to work, I would consider it a bug.

A single button can only handle a single CC, and two fader buttons must use the same single CC to cooperate.

In addition, zoom commands are not value-driven; they cannot be visualized with a fader position. Any CC16 command with a value greater than 0 will zoom in one step, and any CC17 command with a value greater than 0 will zoom out one step.