I find that most UI and Swatch bugs I get in my game, after patches, are due to 'UI Cheats Extension Mod' or 'More Columns' mod, they are updated regularly, so if you have either of those installed, it is worth checking if they have an available update.
There was also a mod recently introduced that allowed users to change colours of hair, clothes, and more using the makeup customization tool that lets you edit hue, saturation, etc. If you are using that mod, it might also be that, but I'm not sure as I don't use that one personally.
i do actually have the colour swatch mod. i imagine it needs updating. i thought it was mc command centre but looks like its not.
