Happened twice now & in both cases, while the application is responsive (e.g., can move around the map, etc.), the game itself isn't since it's hung up on the resolving the combat & is waiting for a mass driver shot that missed or something & is cruising clear across the map. Which is "fun" on an insane map & the angle puts it clear across the map. I tracked this second one & it didn't stop at the edge of the map either & continued merrily on its way into the uncharted void.