Blend tree animated character slides before animation starts

I have an animation blend tree with two sub-trees, both with blend type of 1D, one for walking and one for running.





All animations are imported from Mixamo. The problem I am having is that when I start the game and I press the Up arrow key, to make the character run, he slides for about two seconds before he starts running. Here is a short YouTube video illustrating the problem:

The code for detecting player inputs and triggering animations looks like this:

Code (CSharp):

1. [RequireComponent(typeof(CharacterController))]
2. public class MyController
3. {
4.     private CharacterController _controller;
5.     private IMovementInputHandler _movementInputHandler;
6.     private Transform cameraTransform;
7.  
8.     void Awake()
9.     {
10.          _controller = GetComponent<CharacterController>();
11.     }
12.  
13.     void Start ()
14.     {
15.         _animator = GetComponent<Animator> ();
16.     }
17.  
18.     void FixedUpdate ()
19.     {
20.         float horizontalInput = _movementInputHandler.HorizontalInput();
21.         float verticalInput = _movementInputHandler.VerticalInput();
22.  
23.         cameraTransform = Camera.main.transform;
24.      
25.         DebugConsole.Log ("Horizontal input is: " + horizontalInput + ", Vertical is: " + verticalInput);
26.  
27.         _animator.SetFloat ("Speed", verticalInput);
28.         _animator.SetFloat ("Direction", horizontalInput);
29.  
30.         Move (horizontalInput, verticalInput, cameraTransform);
31.  
32.         // Calculate movement
33.         Vector3 movement = _moveDirection * _moveSpeed + new Vector3 (0, _verticalSpeed, 0);
34.      
35.         // Move
36.         _controller.SimpleMove (movement);
37.     }
38. }

If I select my main blend tree, in the Animator window, and set the Speed parameter to 1, the character immediately starts running, but when I run the game, the sliding starts happening.

What is the problem here?

 

Sorry for the shameless bump, but I am really stuck on this. Any ideas on what could be causing the problem above?

 

"This video is unavailable"

Did you set it to private?

 

Oh my bad. Yes, it was private. I set it to unlisted so you should be able to see it now. However, I've resolved the problem already. It wasn't caused by anything to do with blend trees. The problem was the "Has Exit Time" checkbox in the Inspector window for a transition between the Idle state and the blend tree (see screenshot below). I figured it out when my walking animation started doing the sliding thing too, even though it had been working fine all along and it wasn't even in a blend tree.

My guess is, when I created a transition between my Idle state and the blend tree in question, the "Has Exit Time" checkbox was checked by default. Once I unchecked it, the sliding disappeared and my animations started working correctly: