Future Lighting is generating weird shadows (not AO) on the grass decoration, how do I remove it?

hi everyone, I need your help, the truth is I don’t know what is happening with roblox studio, 3 days ago it started to slow down, can’t see the particles and the most serious problem, for my game, is that the grass is generating some shadows that ruin it completely the style of my game, I was always using the Future lighting type and its behavior was correct with the other models and their materials, such as trees, rocks, houses, custom materials(terrain), but with the grass never saw those shadows as you can see in the images, I don’t know what could be happening, I really need your help

before, the type of grass that I need for my game

how it looks now

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Might be a little late but this is because of Roblox implementing foliage shadows. AFAIK the only way to get around this is keeping the lighting on shadowmap, as theres no option to disable it.