Black outlines appear around foliage textures

Grass, flowers, and other foliage blocks have a noticeable dark/black outline around the edges of their textures. The issue is most visible when multiple grass or flower blocks are placed close together, creating a dense area of vegetation. The black edges become more prominent where the transparent parts of multiple foliage textures overlap.

Expected result:

The transparent areas around foliage textures should appear clean, without any visible dark or black outline.

Actual result:

A dark/black fringe appears around the edges of the foliage textures, especially in areas with dense vegetation.