Platform, device version and operating system:
PC/Mobile
What you were expecting to happen, and what actually happened:
Just to nip this in the bud, the upcoming Stone Seeker weapon (ID: 1483) got assigned to Hell Gate. This looks like an off-by-one issue that may go unnoticed, the intended kingdom is probably Hellcrag. Weapons don’t contribute to kingdom power when assigned to factions, all weapons currently belong to kingdoms.
But they fixed the Hoard Mimic traits, once they were aware of the issue. This bug report is an attempt to get it fixed prior to it going live. It’s currently still something being worked on, so they might fix it even without a preliminary bug report. It’s just that these off-by-one issue almost always seem to make it into the final release, probably because they are difficult to spot if you aren’t too familiar with game mechanics.