Netherite trim material applied on netherite armor by upgrading diamond armor

If you upgrade the diamond armor to netherite while it has a netherite trim material on it then you can keep the netherite trim material completely on your netherite armor.

According to the Snapshot article it shouldn't be possible to put a material on the same material armor but with this bug you can.

In the attachments you can see the bug happening.

Steps to acquire netherite pattern on netherite armor:

1. Put diamond armor inside smithing table
2. Give it a pattern and use netherite material
3. Put the trimmed diamond armor back into smithing table
4. Upgrade the trimmed diamond armor to netherite
5. Enjoy the trimmed netherite armor with netherite material