Fuel Crossfeed selection state in the Cessna Citation CJ4?

Is it possible to determine the current state (left/off/right) of the fuel crossfeed selector in the CJ4?
I have checked the FUEL TANK SELECTOR:1 simvar, which seems to hold 19 or ‘Left main’ on start-up when selector is off and doesn’t change, and FUEL SELECTED TRANSFER MODE which holds a value of 5 and doesn’t change.

Is this an error that I should report via zendesk, or is there another simvar (or lvar) that I can use to determine the current state of this switch?

John