Hello,
Yesterday, on the same listing, two people made an offer.
I didn’t see these offers immediately, but about two or three hours later. And I discover that they were refused. But it wasn’t me who refused them!
I don’t understand this. Is it new? Is it a bug? Did the buyer ultimately cancel their offer?
Thank you for your answers 
I think I’ve solved the problem
In both cases, the buyer, not seeing me react, decided to buy, which de facto cancels the offer. The first buyer finally canceled the order, and as a result, I had the same case twice on the same product, which gave me the impression of an automatic process.
Am I right?
Hello!
Yes, I think that’s it: I had the same situation and if you don’t react, the buyer can cancel their offer. Or if the item has been bought in the meantime by someone else, that also gets canceled.