nutyworks

It works as intended.

In 1.20.5 changes,

• Changes to minecraft:item options:

  • Field `value` has been renamed to `item`

  • Field `item` now also accepts plain item name to represent item stack with default components

Therefore,

/particle minecraft:item{item:"minecraft:diamond"}

will work fine.

Steps to reproduce:

1. Run the following command twice.

   /summon minecraft:item_display ~ ~ ~ {item: {id: firework_star, components: {firework_explosion: {shape: small_ball, colors: [I; 0]}}}}

2. Modify one of them with following command.

   /data modify entity @e[type=minecraft:item_display,limit=1,sort=nearest] item.components."minecraft:firework_explosion".colors set value [I; 16777215]

3. Quit and rejoin.

4. Both firework stars are displayed white.

I wrote down some code and found these 200 pairs of duplicates. Textures are from 1.19 assets.