inconsistency with fence texture

Steps to Reproduce:

1. get any wood fence thats not bambo.

2. place a row of fences and look on the sides that dont face towards positive x or z.

3. break either the left or right fence depending on if your looking towards positve x or z.

4. repeat to see the inconsistency.

Observed Results:
texture changes depending on if your looking towards positive x or z.

Expected Results:
texture should not change.