Hundreds of AIController issues (in the vehicle)

Hello.
I have about 50 NPCs with AIController (default) on my map. Anyway, I have a drivable vehicle on the map. As soon as I enter the vehicle, I see that the number of AIController in the OUTLINER is 300.

When I get out of the car and get back in it goes to 700. and so on.

(The number of NPCs on the map does not increase, let me also mention that, only AICONTROLLER does)

For this reason, the fps drops and the game lags. How can I fix this problem? I don’t want AICONTROLLER to increase, isn’t that so unreasonable? After all, I’m just getting into the car. Why are other AIControllers increasing?