Items added to #cauldron_can_remove_dye by datapacks can't be undyed

Items added to the #minecraft:cauldron_can_remove_dye item tag by a datapack still can’t interact with water cauldrons to remove the dyed_color item component, whilst items that are in that tag in vanilla can.

Tested by creating a datapack (see attached) and enabling it in a new snapshot world. The datapack adds a minecraft:crafting_dye recipe for dyeing a minecraft:stick, and adds minecraft:stick to the #minecraft:cauldron_can_remove_dye tag. After crafting the stick with dye in a crafting table, it shows the dyed_color tooltip as expected. When using the item on a water_cauldron, there is no arm animation, the cauldron level does not change, and the item also remains the same. However, repeating this with a leather chestplate does work, interacting with the cauldron to remove the dye as expected. Holding both a dyed leather chestplate and a dyed stick in the inventory, running the command /clear @s #minecraft:cauldron_can_remove_dye removes both items, indicating that the stick was correctly added to the item tag.

Output from the /version command:

Server version info:
id = 26.1-snapshot-5
name = 26.1 Snapshot 5
data = 4770
series = main
protocol = 1073742115 (0x40000123)
build_time = Tue Jan 27 05:00:00 PST 2026
pack_resource = 79.0
pack_data = 98.0
stable = no

Server version info:
id = 26.1-snapshot-5
name = 26.1 Snapshot 5
data = 4770
series = main
protocol = 1073742115 (0x40000123)
build_time = Tue Jan 27 05:00:00 PST 2026
pack_resource = 79.0
pack_data = 98.0
stable = no