Shield Changing colours after adding a banner to it.

Put the summary of the bug you're having here

What I expected to happen was...:
Have my Banner on my shield

What actually happened was...:
Wound up changing my shield colour but the Banner was on there

Steps to Reproduce:
1. Green shield
2. Green banner with a light grey stripe going from bottom left to top right and a black flower charge over that
3. combine the banner and the shield and instead of getting a green banner shield i got a black shield.
4. Then when i paused the game a few hours later the shield went from black to purple.