Shields do not show their banners

When adding banners and shields together, the shield does not get the correct banner on it.

When combing a shield and a banner, they combine and the pattern on the banner comes on the shield.

This no longer happens, the shield is just a regular shield now when adding plain banners. When adding patterned banners, the shield turns black and obtains the pattern only, not the background color.

Steps to Reproduce:
1. Combine any pattern banner and a shield together in the crafting table.
2. You will see the shield remains the same if its a plain banner.
3. You will see the shield turns black and get the added pattern if you have a patterned banner.