I made a portal where enemies spawn from it. Right now it spawns two enemies, with an interval of 2 seconds between each other. A tower spawns an trap at the enemies location immobilizing it (change its max walk speed to 0). However, when the trap spawns at the first enemy location, the second enemy does not spawn. I tried changing the max walk speed to random values such as 0,5,20,40 etc and it seems that when the max walk speed is between 0 and 10, the second enemy does not spawn. Why is that ?