It's a Trap API - Can't figure how to reset detection

I always try to test out my traps and the detection ranges with a dummy token as I am setting them up, adjusting things as I need to.  For some reason the last couple of days once I have detected the trap I can't seem to get the detection to trigger again, even when I clear the indicator circle.  So is there a way to reset the trap so the same token can "redetect" the trap?

Let’s get the usual information. Jumpgate or Classic game? Default or Experimental sandbox? Chrome or Firefox? Character Sheet?  When I was helping someone with It’s a Trap , the trap token was always on, because I hadn’t selected the Delete after Activation? property.

Perhaps after you have detected the trap it need to be moved back to the GM layer.