Apologies for the delayed response.
I tend to go radio silent at times, but I do try to eventually reply to things.
I'm sure you've moved on to other things by now, but I'll address this anyway.
It's possible you've found a bug, but I have to remind you that the door has to be closed in order for it to work.
If the door is closed and the light is flickering, it shouldn't take more than a few seconds to stop the flicker.