GTN 750 Transponder not taking new code and mode change

[pilotmarcog 5]

When I try to enter a new code and also change transponder mode at the same time, it first shows the new code and the transponder mode, but then quickly changes to 1200 (VFR). I do it a second time and then it takes. The issue seems to be trying to change the transponder code and the mode at the same time. Any combination of changing only one at a time works perfectly. I tried to look for any dref that might shed a light but I cannot find anything. 

Any advise would be appreciated.

Thanks and regards,

Edited April 4, 2022 by pilotmarcog

[RXP 2,338]

Hi,

This sounds like a limitation with the XP11 datarefs/commands, not being able to handle 2 changes in the XPDR module during a single update cycle.

I'm adding this in the list of corrections for the next update and if there is a workaround, we'll implement it.

Thank you!