Battlegrounds - An Unknown error has occurred!

Extravaganza

So the weirdest thing just happened.
I finished round 3 in Battlegrounds; Bastion vs Bullseye with 100% health left on my attacker, pretty sure I'm winning the match... Then instead of a victory screen I get a message: An unknown error has occurred, and it throws me out of battlegrounds back in to the main menu..
Immediately went to the history tab to see who won and it wont show the match, like it didn't happened...
Then 3 seconds later I'm pulled right back in the last fight with both attacker and defender at 100% health and the timer has run out.. Defeat! What...
Anyone else had something similar happen?