ItemDisplay doesn't send metadata

[SinanAkkoyun]

[X] The FAQ doesn't contain a resolution to my issue

Versions

• minecraft-protocol: 1.54.0
• server: vanilla/spigot/paper 1.21
• node: 22

Detailed description of a problem

When logging bot._client.on('entity_metadata' in a mineflayer bot, it outputs metadata for text- and block displays, but not for item displays.

Current code

// DEBUG
  bot._client.on('entity_metadata', (packet) => {
    console.log(`[entity_metadata] Entity: ${packet.entityId}, Metadata:`, packet.metadata || 'MISSING')
  })

// or also print out metadata of these, all empty
Object.values(bot.entities).filter(e => e.name === 'item_display')

Expected behavior

The protocol should correctly read item_display entities too

Additional context

Thanks in advance for help

[SinanAkkoyun]

Closed on accident, can't repoen, moved to: #1380