Quote from: ranochigo on July 12, 2021, 10:51:51 PM

As of now, reorgs of more than a single block is quite rare, because of how fast the blocks propagates but it still has the potential to happen.

Speaking of, the last time I am aware of a 2 block reorg was at block 656,477, which was in November last year. Is anyone aware of any more recent reorgs of greater than a single block? Incidentally, there were no double spends during that reorg.

Quote from: pooya87 on Today at 02:53:32 AM

Users don't even realize something like that happened and the other block contains almost the same transactions.

Exactly this. There is usually a significant overlap between candidate block A and candidate block B. Further, whenever the winning chain (let's say chain A) is extended by another block, then any transactions which were included in candidate block B but not candidate block A will usually be included in the block A+1. Most transactions will go from 1 to 2 confirmations normally, and a few which were in block B but not in block A will go from 1 to 1 confirmations when included in block A+1. Only the very rare transaction will be included in block B but not in either of A or A+1, and will go from 1 confirmation back to unconfirmed. But of course unconfirmed doesn't mean money has been stolen - it just means the transaction is back in the mempool waiting to be mined again.