**Description of Craft:** A basic ship with a 5 block, tier 0 reactor.
**Note:** **Chamber Tier** shall be used to refer to the order in which chambers are connected. A **Chamber Tier** of **1** is a chamber that is connected directly by conduit to the reactor. A **Chamber Tier** of **2** is a chamber that is connected by conduit to another matching chamber.
**Description of Bug:** When adding a chamber block to a chamber setup in which the added chamber block would make one chamber tree a **Chamber Tier 2**, if the added chamber block touches a chamber block of the same type that is part of a **Chamber Tier 1** chamber tree, then the game crashes. If the game does not crash immediately, attempting to remove one of the chamber blocks will crash the game. I have tested this with both Stealth Chambers and with Defence Chambers.