Just wanted to add my two cents.
I just experienced this problem, and my issues lied in two ares: the preview resolution, and my obscuration layers. Fortunately, my obscuration layers were not critical to my end result, so disabling them allowed me to render accurately. Once I upped my preview resolution to “Full” I was then able to view my work properly and render accordingly.
Thanks for your wisdom, Gary!
https://vimeo.com/explosivegraffix