In the last round I played, “The Emerald Nebula” my ships stopped moving completely when they got to the middle of the map. I’m not entirely sure what caused it but I stuck it on 4x time and let it run a couple of minutes before I quit. The cruisers never moved within range of their guns or missiles. They’d occasionally fire at the escorts of the enemy ships. They were a bit close together but it looked like there was some wiggle room, and even ships on the end stopped. The enemy ships didn’t move either, and were closer to the middle.
They were mostly cruisers, with a few frigates on each end and in a formation that looked a bit like a crescent (