Mine
public text v1 · immutable[phones]
include => callControl
include => checkVoicemail
[callControl]
exten => preAuth,1,NoOp(well hello there) ; <-- this is what gets matched when you do the Goto() from the checkVoicemail context.
[checkVoicemail]
exten => 8500,1,Goto(preAuth,1)
exten => preAuth,1,NoOp(this does not get hit as you might expect)