The ornament has some strange colors when applying shaders; like a bright green color on shaders that don't have any green at all. The "buggy" color changes depending on the shader (the color may be a bright/oversaturated red, yellow, or blue), but is usually in the same place as shown. Some shaders seem unaffected. For this reason, it seems like a bug.
edited for clarity and moved to game issues category from eververse category