I don't see that with Pandoc, which is what I use for preview (ant chapter-to-html target). Pandoc renders it correctly. I also tested this with Pegdown, and Pegdown restarts the numbering regardless of whether the image is indented or not. Github may render it correctly if it's indented, but that's not our target platform for publishing, so I don't think we should set standards based on what Github does. 

I think this is a bug in Pegdown that we may need to investigate fixing.