Steps to reproduce:

1. Download and open attached project.
2. Open scene: main
3. Select game object in Hierarchy: Cube
4. In the Inspector delete mesh filter from that object.
5. Notice that Cube did not disappear from game or scene view.

Expected result: Cube should not be rendered without mesh filter.
Actual result: It is visible on screen.

Notes (workaround): After saving and reloading the scene, the cube did disappear.

Reproducible with: 5.4.0b1, 5.3.1p1, 5.2.4f1