To reproduce:
1. Open rigidbodyless collider test project
2. Open test scene
3. Enter play mode
4. Observe as "destroyer" game object falls through platforms
5. Pause play mode
6. Move destroyer back above the platforms
7. Unpause play mode
Expected result: Destroyer falls on the first platform (or doesn't fall throught the platform after destroying the rigidbody)
Actual result: It falls throught
Note: Disabling and enabling the collider of the platform fixes this so it works properly.