The Hurricane Heist (2018)

Factual error: The repairman was freeing the soldiers from inside the locked gate using bolt cutters. The terrorist noticed this on the video feed so they electrified the fence, shocking the repairman. This would not have happened because the bolt cutters have plastic handles just for that reason, to keep you from being electrocuted by mistake. (00:54:50)

Will: We're about to get crushed by the biggest storm of the century.

Question: After the hackers get almost the entire code, they say that if they try to make a mistake the vault would be locked for 48h. Earlier in the movie they tried their obsolete code before discovering that it wasn't working. At that time why didn't the vault lock itself for 48h?