I wanted to post that a while back but wasn't registered.
With the 1.10 version. In the campaign battle where you are back to save Earth, you start with a dreadnought.
I used it to protect the planet. After a while a dread lord ship moved toward Earth, I made a fleet with the dreadnought and 2 smaller ship to take on the incomming Dread lord ship. I was using the combat viewer to see all battle that might be the reason for the problem.
The battle happened, the Dread lord moved in, attacked the Dreadnought, destroyed it. But the Dreadnought managed to get 2 hit in. Even tough it should have been dead by the first one... But the thing is that the explosion took a while to finish and it keep it around long enough to shoot. In the end, I won that battle that I should have lost because a small ship was left standing after the dead dreadnought killed the Dread lord ship.
What seems to be missing is a simple check to see if the ship is dead before attacking.
So with simultaneous attack, I fear that if that haven't be fixed that it could happen a lot more.