Foliage that has been deleted in 4.6 will return when a project is migrated to 4.7.
1. Download .zip at link provided and unzip file:
2. Open editor (UpdateTest project)
3. Look at hill next to text render actor "Deleted"
Note: The foliage on this hill was deleted in 4.6, the control hill was left alone.
Head over to the existingAnswerHub thread and let us know what's up.