Saving with Zip format (including SingleFileZ) fails to save some elements

[onoter]

Describe the bug
Saving a certain webpage as zip format (or save it using SingleFileZ) will not save a png picture on the top.
However, saving the same page with HTML format will correctly save the png picture.

To Reproduce
Steps to reproduce the behavior:

1. Save this page with default settings (HTML format).
2. The page is correctly saved.
3. Set Options -> File format -> format to self-extracting ZIP (universal)
4. Save that page again. And you'll see the picture missing.

Screenshots

1.  
   

2. The picture is missing when saved as zip:

   

[gildas-lormeau]

Thank you for the detailed report. I was able to reproduce and fix the bug. The fix will be available in the next version.