Green tint applied to grass block top texture regardless of colourmap in dark forests

When changing the Colourmap and block textures for bedrock edition for a custom resource pack, sections of the world apply a green tint (Usually the dark oak forest) to the outcome.

To Reproduce:

1. Create a resource pack and turn all the different colourmap's white
2. change the block textures for grass (specifically any relating to "top") to pure white
3. Load into the world and find "roofed forest"
4. locate area which is displaying a green tint on the white
5. validate the green tint on top of the block remains regardless of changes to resource in that specific biome