I am using Magento 2.2.6, i have a color attribute of multiselect type. i had assigned this attribute to all product type. when i assign one group product of color red to category "Category 1" then in the layered navigation i can see many color options like below
Red (2) Blue (1) Green (1) Yellow (1)
i debugged why this is coming. i found that this group product has 4 simple product of color red,blue,green & yellow.
so thats why when i added one group product i am able to see this much color option in the layered navigation
What i require is i dont want to include this simple product's color options in the layered navigation.