Don't know exactly when the bridge buff was taken, but there was a visual bug with it that caused it to stay up for the game. Match ID: 31269140
It was present on both side because i saw the other team also trying to heavy melee the buff but it didnt give anything and the buff symbol stayed up.
Adding to this, I just got the same bug in my match: 35292048
It was also the movement buff on just one side of the map. afaik I was the only one seeing it. I didn't see the other team try to hit it and I asked my party if they saw it and they said they could not.