Twisting vines texture changes, appearing to move downward when another twisting vine is placed above it

When a twisting vine is placed on top of another, the lower vine shifts downward slightly, which is a texture issue.

How to reproduce:

1. Place a twisting vine
2. Place another twisting vine above
3. Take a closer look at the bottom left of the bottom twisting vine

Expected result:

The bottom twisting vine would not move down.

Observed result:

The bottom twisting vine shifts down slightly, which is clearly visible in the bottom left.