Yes, I thought it was doing some hit moving from memory, since I have not played A16 in ages, but in code it was specifically stopping movement when attacking. It was probably just restarting pathing right away, so it did not feel like much of a stop.
Now it does not stop movement on attack. Movement stops when in movement range and attacking starts when in attack range and both have motion estimation, so it makes better choices based on moving toward, away, same or sideways from each others positions.