@jackie_w:
https://github.com/kovidgoyal/calibr...c3d70c8ed5a2cc
@Becky:
https://github.com/kovidgoyal/calibr...ef82687614fe1e
However, I doubt that is the source of your issue. calibre on windows will change color theme only if the registry key
Code:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Themes\Personalize\AppsUseLightTheme
changes its value from 0 to 1 or vice versa (see the function windows_is_system_dark_mode_enabled) So something in your system is changing that registry key.