When playing the animation, the character twitches. Because of which?

Question

Unity

I downloaded the animation from the mixamo website. When the animation is played in the game, you can see how the character twitches.
-
I downloaded the animation with these parameters:
Format: FBX for Unity
Skin: without skin
Frames per Second: 24
KeyFrame Reduction: non-uniform
-
Probably a stupid question, but could this be due to the fact that I increased the size of the character

Answer 1

I think this is because of this. In Unity3d, how to make an animation of an object relative to its current position?
(a slightly different question, but the answer should suit you)
And no, this is not because of the size of the character