WT-9 Dynamic no autopilot & lights

[HighBypass 2,339]

I set the Dynamic up cold & dark (used a saved plan from another aircraft, set time & location then called up a Dynamic). After starting the engine I noted that the charging warning light was still lit. I went for a fly around and used the autopilot for some of it. After a short time I noticed the navigation lights were no longer on, nor would the autopilot switch operate; it would click but not animate, and the pop up display no longer had hdg and alt in it.

 

Is this a bug, or some kind of systems modelling where if you lose the alternator, then systems shut down once the battery begins to drain below a certain level?

 

I reset, called up another WT-9 which started fine and the charging light went out.

 

Cheers.