[Trexmaster]

Somehow, someone had managed to make a chest be untouchable due to this. I'm not sure what they did, but, the chest in question always gave the prompt as mentioned in the thread name.

I'll add more information when/if I can get to testing this, or the problem arises again.

UPDATE: Inviting someone to a party (and then they accept) while they're unlocking a chest will cause this issue.

[Neus]

This was caused by checking for traps and not finding any, actually. Corrected anyway.