Player falling through the floor on running?

Hello everyone. Have anyone experienced a bug of player falling or sinking through the platform like in the video? I have added a plane with box collider. And box colliders on players feet. So, how to solve this bug?

Colliders are:

Protoype video:Video Url

Moreover sometimes the player falls down completely through the ground :confused: .

Code to move player:

private void FixedUpdate()
        float sideMotion = Input.GetAxisRaw("Horizontal");
        float straightMotion = Input.GetAxisRaw("Vertical") ;
transform.Translate(Vector3.right * sideMotion * strafespeed * Time.deltaTime);

        transform.Translate(Vector3.forward * straightMotion * movementSpeed * Time.deltaTime);

your animator needs to be configured to animate physics. other than that, do not translate the guy. either use AddForce, set velocity, or mark the rigidbody kinematic and use MovePosition.