Shadows being almost completely removed

[mceledon]

Hi, I think I might be experiencing a bug. When I open my old file that rendered correctly last week, the shadows are perfect but if I click on almost anything, the render preview changes in the canvas and my shadows disappear. I've even rendered a few times with different shadow opacities and they all come out the same so I know there is something going on. Please help!

How the render should look:

How the render should look

the new render even though I've changed nothing.

the bug? Can't seem to get it to render the same even though I haven't changed anything.

[Ussnorway]

Rendor it to Psd then open that in Photoshop and unclick the clean up layer 

[Ares Hovhannesyan]

Are they look the same in preview mode?. Did you use Match image feature?  Just interesting to know.