Strongbox dropped 2x swords, 1x dagger and 1x flail

I was doing a relatively normal Steppe map and came across one of the beetle strongboxes which I triggered and it ran off. In the process of following it I encountered Delwyn and a hare spirit. The hare spirit entered the strongbox and after defeating it, it dropped a number of items including 2x swords, 1x dagger and 1x flail. These items aren’t yet in the game to my knowledge so I figured I should make a bug report about it. I have a video from when they dropped if you want me to send it through