Reproduction Steps
1. Create a model with at least 2 unique parts in Workspace (could also be bones instead, either one causes the issue)
2. Create a rigid constraint inside the model
3. Connect the rigid constraints to those 2 attachments
4. Add a World Model somewhere else in the explorer (such as under ReplicatedStorage, ServerStorage, etc…)
5. Move the model from Workspace to the newly created World Model
6. Crash!
Expected Behavior
Roblox not to crash when I move the rigid constraint from one world model to another
Actual Behavior
Roblox crashes and quits the application, losing all unsaved progress
Workaround
nope
Issue Area: Engine
Issue Type: Crashing
Impact: High
Frequency: Constantly