[timepiece]

I've recently been working on a project to provide cover art to all of my downloaded fanfiction. I have noticed that on my Oasis, which I always have in dark mode, several of the covers always appear inverted in the grid display in the library.

The covers in question are all very dark - probably at least 80% black, if not 90%. They all appear normally in day mode. At least one is from a traditionally published book. They all appear correctly in the little thumbnail at the bottom of the library display. Some of them also will not show up when the device is off, even though I have that enabled (but 10 of 16 will. Five correctly, five still inverted).

Some of them I'm willing to replace, but some I'm very attached to as-is. Anyone have any clue how to force them to appear normally (besides switching to day mode)? These are all non-DRM files I can edit at will. I use the Calibre editor.