The Bug
Piglins doesn't inspect raw gold first, instead, they simply just pick it up and store it. This isn't in parity with Java Edition, where they inspect first. According to the JSON files, the raw gold is missing the "admire": true and "pickup_limit": 1 string.

Step to Reproduce
1. Get to the nether.
2. Spawn a piglin.
3. Drop a raw gold.
---> They don't inspect, raw gold gets stored immediately inside piglins' inventory.