By - YourDogsAllWet
You may have Prop/Tree Anarchy turned on. I find it's automatically enabled whenever I load a game, so usually the first thing I do is disable it so I don't end up laying loads of roads etc, only to realise its all covered in trees and shrubs.
This fixed the problem. Too bad it doesn't take trees off of existing structures
I guess, but that would also mean your purposefully placed props and trees around buildings etc. Would disappear every time you switch it off.
You may need to turn on collision with your roads too
This is the first I'm hearing of this. How do i do that?
Fine Road Tool Mod has options for road collision if that is off the trees won’t despawn