When there's occur delaying phase, i suggest that you should leave that bounty. Because of you will lost your time just to wait for the bounty to resume. It is not the matter of the reward though, but kinda wasting your time that supposed could bring you more profit from the other bounties.
I think this is the wrong decision, because if you delete the signature, when the bounty campaign has not ended (even if it has been extended), then you will not get anything, but if you stay and will participate until the end in the campaign that was extended - you there is a hope to receive your reward in the future.