Automatic Day/Night Mode Shift Not Always Working

I like keeping my iPads in dark mode throughout the day. However, I'd like to use automatic day/night mode shift in ATracker. This is currently impossible: even with the automatic day/night mode shift activated on ATracker's Today screen, ATracker remains in dark mode all day long.

Thank you if you can make it possible for ATracker to observe its own day/night mode settings, independently from system-wide iOS settings.