On 1.5.2 here with max 2016.
I'm finding that occasionally, but not always, when using a cameramod which is overriding things like EV and tone mapping, but NOT Bloom/Glare or Vignetting, I set a render off and all is fine. But in the VFB if I then start playing with Glare/Bloom or Vignetting suddenly the CameraMod will become ignored (but still enabled on the camera) and the VFB will override EV/Tonemapping, and image is effectively zero'd out, or with a bunch of misc values. If I re-render everything goes back again properly and the cameramod once again kicks in, with the VFB tone mapping greyed out as it should be.
I have reinstalled corona twice, including once by manually removing everything as per your guide online.
