TreeIt - Leaves Darken At The Bottom In UE5.3

Hello!

I have made a tree using TreeIt. But when applying material to its leaves in UE5.3, they weirdly darken at their bottoms.

I preview the same material on just a plane since TreeIt leaves are just squares too, but it does not affect the preview mesh.

Leaves mesh when a material is applied to it(Shadows are turned off):

Square preview mesh with the same material:

Tree in the TreeIt(just in case):

Thanks for basically any help.

Bumping the post.