I was able to reproduce it in one way. If you start the battle without assigning any ships to your side, you immediately lose because you have no ships. Did you assign at least one ship with a pilot and weapon to your side?
(The fact that the game lets you start that battle with out any ships is a bug. The fact that the game is not more clear that you need to assign ships to your side is an oversight that we need to fix.)
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The you lost is cuase you gotta add more than one ship. by default it seems to add enemy ships and no player so you always lose. The game should not let you begin a battle with ZERO ships. That shouldn’t even ber an option cause it always results in a loss there no benefit to the player oly negatives.