Proposal: Too many thieves
In “The Break-In”, change
For each Burglar who is the only Agent at a Spot which contains an Artifact, set that Artifact’s location to be that Burglar’s name.
to
For each Spot that contains an Artifact and at least one Burglar (not counting Burglars who have Encountered a Guard this Break-In), set that Artifact’s location to the name of a secretly randomly chosen such Burglar.
It’s weird that if you have two Burglars on a Spot, neither of them gets to steal the Artifact (even if one of them got caught earlier!), and that mechanic maybe makes the game more guard-sided than it really should be.
Clucky: he/him