The coloring of the decorated pots is not working correctly

Summary:
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the pots show different, inappropriate colors in some parts of the map

Observed Results:
I was visiting the Trial Chambers when I broke a pot, and when it became an item, I noticed how its color turned strangely purple, even when I placed lighting around the pot. Then, I placed the pot on a higher layer, still in a dark place, and the pot became colorful, emitting light in the dark.