Some function stops working at level BP

Hello all, I got a problem or maybe I m doing something wrong. Need help.
After the game is cooked and I m playing on windows. Some function works fine and simple stops working after some time or maybe by any event that I m missing. When I play on the editor everything goes fine on the gameplay.

Is important to say that is only in my “level blueprint” that this is happening, the main function that stops working or even didn’t start properly sometimes with the “BeginPlay” line is on the images…

Thanks in advance for the help!

(on the green circle is coming from )