Tripwire texture is not mirrored correctly from behind

For a comprehensive list of other examples of issues with 2D planes in models not being mirrored as expected, click here.

The bug

The planes composing tripwire do not mirror on the back as one would expect, resulting in physical/illogical weirdness.

Fixed models (Mojang has full permission to use this fix):

How to reproduce

1. Place tripwire such that it will be visible from both angles

2. View a specific tiny clump of pixels of the tripwire

3. View the exact same clump of pixels from the other side of the texture plane

4. Note that the exact texture pattern at that position is different, even though it should be the same