Glad to hear it! A relief I’m sure, and I know the feeling. Mine did this once and like yours seemed to miraculously fix itself after being left alone after I can’t remember whether it was some kind coaxing words or a bout of some choice anglo-Saxon!
Anyway, I didn’t dare contribute to the...
I'm personally not a fan of Autodoc after an experience with them swapping out ordered parts for their (lower quality but the same price??) "alternatives".
Wouldn't use them at all now myself after that kind of nonsense.
I think it probably has to do with some gremlin in the alarm wiring.
A couple of years ago, mine started playing up, random beeps etc, the last straw was when it took to keeping the hazard warning lights going constantly, initially the only thing that cured that was taking the relevant fuse...