Missing `upgrade_slot_indices` in v2/characters equipment

Currently, there is a discrepancy between two-handed items in inventory and equipped two-handed items:

Inventory/bank items have both upgrades and upgrade_slot_indices
Equipped items only have an upgrades field, but no information about the slot(s) used

Equipped two-handed items should also have upgrade_slot_indices to indicate which slots of a two-handed weapon are occupied.

You need a two-handed weapon with a single sigil in the second upgrade slot.

Response from /characters/:id/inventory when the item is in your inventory:

{
  "id": 29139,
  "count": 1,
  "upgrades": [
    24613
  ],
  "upgrade_slot_indices": [
    1
  ],
  "binding": "Account"
}

Response from /characters/:id/equipmenttabs/active when the item is equipped:

(The upgrade is correct but it's impossible to know which slot is occupied.)

{
  "id": 29139,
  "slot": "WeaponA1",
  "upgrades": [
    24613
  ],
  "binding": "Account",
  "location": "Equipped"
}

No response

The game client itself shows the wrong slot in the item tooltip:

The item customization panel (right click -> Customize) does however show the correct slot:

gw2-api / issues