if you set the active time segment to begin at frame -2 at animation prepass, the whole sequence does not render correct light solution.if you set the active time segment to begin at 0 and render “range” from -2 to… it works.
It seems that the saved .vrmap files are empty when the active time segment starts with a negative frame number and “Use camera path” option is enabled. A workaround for that would be if the active time segment begins at 0 and the render range - from -2, as you have mentioned in your previous post.