Can someone explain to me how this works?

Since CG have now stuffed up the Levi mirror, if I get to this situation as per the first image.  My Levi is set to go before the enemy.  I do a basic and suddenly the enemy Levi jumps above mine and does it's ultimate.  I then go on to lose the battle.  This has been happeneing since the Levi first came out, but was not as big an issue before, as could still get through the remaining ships.  Now you have no chance.

What am I missing?  Thanks a lot

Then this is at my next turn.  Can see that enemy has control of both Leviathan's: