Attempting to use a Cauldron produces a ''Attempting to use a Cauldron that doesn't exist!!' assertion

Verification builds: 1.6.0.0 - RC0, Beta 15 (980905)

Summary: Attempting to use a Cauldron produces a ''Attempting to use a Cauldron that doesn't exist!!' assertion

Impact: The assertion appears and the game closes.

Repro Steps:

1. Place a Cauldron
2. Open it

Observed Results: "Attempting to use a Cauldron that doesn't exist!!' assertion

Expected Results: The Cauldron should open.

Screenshots/Videos attached: Yes: