Painting with the foliage tool places actors in the streaming proxy within an Foliage instance Actor. For some reason i cannot delete any foliage with the foliage paint tool, also unable to delete the instance actor, Foliage tools do not work even if you delete any foliage instances from the paint tray. However i can independently select a foliage instance and delete it manually or with the delete in the foliage tray. Unable to select all, lasso, etc. only delete an instance selected from the viewport. New project, new level
I think you have to use the Foliage tool itself to ‘erase’ them with the erase brush. Keep in mind that when I did this, I had a foliage actor with no bounds warning that kept popping up for a while in my log when I ran PIE. Not sure why.