Hi folks,
Twice now Sigil has "lost" some files in an epub. The missing files are the cover image in the root folder, the META-INF folder and the container.xml inside that, and all 18 images in the images folder and the folder itself. Sigil is still running and the cover and other images still appear in the book browser (first attachment).
The files in the previous epub (unzip -l) are:
The files in the just saved epub are:
If I try to open one of the images from the book browser Sigil thinks there's just a 0x0 image instead of the original (second attachment).
I
think these files went "missing" not long after the file was previously saved about a week ago, as the modified time on the Sigil temp directory is about 2 hours after the time I last saved the file. I haven't made any edits the epub until today.
This is a Sherlock Holmes omnibus from Mobileread, and in a long-running edit. This instance of Sigil was started on Feb 20. The previous time this happened was on March 1. I thought it might have been some sort of operator error, but now that it's happened a second time here's a bug report. I release that there's little in this bug report that helps reproduce this

.
I've still got Sigil opened, but need to reboot sometime in the next day or two (yay forced MS patches). Unfortunately Sigil was started from Calibre, so I don't have a possible log of anything. After I reboot for patching, I'll open Sigil via Calibre just in case it happens again and something interesting is reported by the problem.
This is Sigil 1.1.0 on Windows 10 version 1909.