fha doesnt requir reserves. although they help in qualifying.
i dont know of any lenders who would repull credit.... but i heard some do.... good question for the loan officer.
the credit report & bank statements you provided to the loan officer are what will be used. they are a snapshot in time. lenders undrstand that.
BUT... we still advise people to not buy anything until after close. just in case
Retired Lender