In DX12 mode, enabling any image effects on the camera will cause that camera to not be rendered to the target on the Game view.

Repro Steps:

1) Enable DX12 in editor (-allow-d3d12 command line argument)
2) Open attached project and scene "Test"
3) Enter play mode and notice how the cube renders to Game view
4) Select "Main Camera" objects and enable any image effects
5) Notice how camera now will not render to Game view

Regression from 5.3.0f4