Backpack: not all wearables shown (e.g. Helmet category item missing)

## Description
When browsing the Backpack in the new UI, not all owned wearables show up. Reported while capturing social media footage.

## Details
- **Platform:** Bevy Web (Google Chrome)
- **Example:** Helmet category item "The Critic Face" (https://decentraland.org/marketplace/contracts/0xc7dddcd8e3818c224d9cd548481a250061e38e02/items/0) is owned but not displayed in the Backpack
- **Wearable type:** Regular wearable (not linked)
- **Consistency:** Reproduces consistently, not a one-off refresh issue

## Expected Behavior
All owned regular wearables should appear in their respective Backpack category.

## Context
Reporter loves the new Backpack UI overall — this is a display/data gap for specific wearables, not a general UI complaint.

## Related Issues
Searched for related open issues, none found matching this symptom. Closest closed issues from the backpack redesign: #170, #343, #396.

Requested by ToxicWaifu via Slack