Navigation is baking on my tree

So I added a nav volume but the navigation bakes upon my tree as well. Is there a way to completely remove the nav from baking in my tree? I dont want to lower the nav position because there are mountains as well! Also, the tree is a foliage and I already tried checking the is dynamic obstacle.

with the tree selected try going to the collision section in the details panel and uncheck can ever affect navigation. that should stop the navigation from building on the tree.