i just chased down a mercantile convoy, an Atlas and three Hermes. after focusing on and taking out the Atlas, one of the Hermes came back down, full travel burn engaged, raced past my frigates and retreated over the bottom border.
i couldn't see much else due to fog of war, but i assume it had reached the top of the map, with its travel drive somehow targeting the wrong escape zone. it did leave the battle just fine though, a couple seconds after it went past me.
don't think i've ever seen that happen before.