Using SW 2016, just started exploring PhotoView 360 and rendering of parts.

I'm rendering some part files that take up to 30 min apiece to render via the 'Final Render' button. Final Render, while taking a long time, renders as expected with my settings. For some reason, whenever I render using the same options in Task Scheduler, the output file's background is missing (or is white). This happens in both JPG and TIFF output. Does anybody have suggestions on what to check or ideas on what it could be?