Character walking animation problem

hi , i have the animation anim pro rifle from Mixamo and i need make the movement of the character that i use from of Mixamo also, but i have a problem, the movement of character it is in horizontal when i walk per some time after start the game. as reference i used this video: *OLD* UE4 Third Person Cover Shooter Tutorial - 1 Setting the Project Up *OLD* - YouTube

when i start is normal

when i move

and more some time moving in several directions

so i need help fast. Thanks