It kicks all players out of the battle soon after start. Tried it 4 times.
2 times it looked like the bug is countdown related, danger zone countdown! But that is only a guess. Maybe you have a look at the related piece of code and it helps to debug it.
Anyway the mode Brawl: Last Man Standing is completely broken right now
reconnect to battle is not working either, ships are being freed from lock shortly after. The battle on server is simply closed for some reason.