When you look at the Design Panel, do you see the image files in the Images folder? Post a screenshot of your BSS workspace with Design>Images expanded. Search the website with find/replace tool for the name of your images, to ensure they are in fact being used on your page(s) somewhere.
I do have the image files in the Images folder. The preview works totally fine, and the images show up, but when it’s published, only 4/6 of the images make it in the assets/img folder on the website.
Well, without seeing your website, there’s really no way to investigate this problem further. I have never experienced this issue. I don’t know any others who have, either.
The only thing I can suggest is that you post a link to your .bsdesign file that we can download, and someone will take a look at your website. Or send it to the devs and have them take a look at it.