This happened after this update and happened at the same time Fortification event started.
I attacked an enemy primarch parked at our base because he was blocking our bank. To my surprise, I saw one of my teammates defended this enemy base. How is that even possible? After the attack I asked him and he said he was defending one of us. He was confused to see me as the attacker. So something is screwed up here.
No video of course. We were still confused what just happened.
The attack list shows correct result. It was the enemy base that was attacked. But somehow we defended our enemy base.