Bug Animation blending issue: Right strafe animation doesn't blend well

I've setup a 2D Simple directional blend tree, and i've noticed the right strafe animation doesn't look good at all when moving in diagonal, but the left strafe blends really good. The right strafe animation is a mirror of the left one. I've downloaded the model & animation from Mixamo.

The animation type is set to 'Generic' because when I set to 'Humanoid' all the animations stop working and I get a warning that says "Binding warning: Some generic clip(s) animate transforms that are already bound by a Humanoid avatar. These transforms can only be changed by Humanoid clips."

Here's some gif / images:
https://media.giphy.com/media/uDmJbZQELBlL6HOU6Q/giphy-downsized-large.gif
https://ibb.co/5WfCNrK