.:QUESTION/HELP:. How to make enemies not run off the map??

[TheDestroyerRockZ]

Some context, my map has sort of an in-game cutscene at the beginning so I set the enemies to 'Do nothing' until a certain amount of time has passed, in which a trigger will change the behavior to default. However, when the trigger triggers, they will start shooting at the player, but they will also run towards the right of the map and fall of the map(Map is incomplete). Not sure what is causing this to happen, but if there is a solution or anyone knows what is the problem, please let me know. Thanks in advance.

[Mean Me]

Could you attach the link to your map and open source it?