Inventories no longer support colors in titles.
1.13:
[media]1.12.2 and below:
[media]Linked issues
duplicates 1
Comments 4
Bit curious about the setup, since inventory names couldn't use text components in 1.12, while § works fine in both versions.
Anyway, we are missing support for text components in inventory names, so fixing that.
My guess is that the setup was originally done with a plugin, Spigot automatically translates § strings into text components in many cases (so probably also item names now, though I'm not 100% sure of that), which would trigger this scenario.
To reproduce:
Note that the item has a colored display name, but placing it and opening the inventory uses the default color.