If a requested child entry not exist, its child keys are showing false, not null

[totalard]

If a requested child entry not exist, its child keys are showing false, not null

{ "id": 15, "name": "S00018", "amount_total": 1255.8, "state": "sale", "amount_tax": 59.8, "cart_quantity": 4, "status_id": { "id": false, "code": false, "name": false, "color": false, "public_notes": false } }