Was playing Objective mode on Dome as attackers with a friend. Was just two of us, figured that staying on and playing, waiting for the server to fill up with other players was going to be quicker than finding a new server that we could both join.
Delivered the first objectives and was able to progress through to the second stage, but decided to just mess around with parkour races and knife fights rather than exploiting the C4 for points.
Upon returning to one of the first stage side objectives (North door I believe, the one to the left of attackers’ spawn), I discovered that I was able to replant C4 on the generator despite it having the destroyed model and the door it operated being open already.
With the interests of testing this bug and seeing how far it went in mind, I planted and we let it explode, which then lead to me being able to plant again almost immediately after the previous C4 had detonated. As such I planted, and my friend defused it, and I was still able to plant again.
My friend was not able to repair said generator, yet I would have been able to plant a numerous amount of times within the time limit of the map.