AI not moving with Open Level

Okay, so I am making a game with a main menu. On the main menu you can buy upgrades go to the character select and click on the character you want. When you click on one of the characters it changes the player character in the main level. But once you play in the level all the AI characters stop moving. The nav Mesh Bound is set up correctly and the AI works fine when you open the level in editor. But once opened from the main menu level the AI characters just stop working. Anyone know how to fix this???

What do you mean, it changes the player? You spawn a new player character?

What is the behaviour of your AI characters? Chasing the player? Do they need a reference to the player?

Explain a little more.