It happens. Probably went out of stock or something.
I had my fastest ever dispute a week or two back, I think it was about 5 minutes from submitting the dispute and Ali accepting and issuing refund, it was for a shipment cancelled, I'm assuming it must have been a bot-approved dispute.
Then again I bought 15 multimeters from a seller last month as a negotiated deal, they had to split into 3 orders for reasons. Two or the orders (10 meters) arrived fine a week or two later, one went to shipment cancelled. Messaged them, given the larger value and that we had negotiated this order speceially I thought I'd give them the benefit of the doubt, and they said they will organise it again, no new tracking number so I was nearly going to dispute, then one day 5 meters arrive out of the blue.