Structures with banners generates with stone fences instead

Notes: Structures with banners generated with stone fences instead, not just end city. This involves end cities, woodland mansions, and savanna villages.

Stone fences appear in the ender city. It seems to me that they appear in place of banners. The screenshot shows the following seed: -3317634371904975210
These coordinates are: 753.26 95.27 -909.58