Issue with rigdibody2d with scale x set to -1

[Vrzasq]

Godot version:
official 3.1.1

OS/device including version:

• GPU gtx1080 drivers GeForce Game Ready Driver v431.36
• CPU i5-750
• Windows 10

Issue description:
I have an issue with rigibody2d when transform scale x is set to -1. It flip my sprite upside down.

The demo scene is setup as show on the picture below:

Basically left unicorn is duplicated version of right unicorn with rigidbody2d scale x set to -1. When I play the scene the left unicorn is flipped.

That happens also when I wrap rigidbody2d with node2d and change x scale on that.

Steps to reproduce:

• Create Scene
• add rigidbody2d with sprite and collision shape attached to it
• duplicate rigibody2d and chnage its x scale to -1
• play the scene

Minimal reproduction project:

unicorn_wars.zip

[KoBeWi]

Duplicate of #12335