[BUG] Theme mode randomly changes to light mode

Submission checklist

• I have searched existing issues and confirmed this is not a duplicate.
• I am using the latest available version of Noctalia.

Bug description

At seemingly random times, my theme mode changes to light mode.

• My theme mode was set to Dark & it seems like it jumps back to Auto when the theme changes.

• Seen another thread on Discord about theme mode issues after suspend (#3729), so I'll mention that I've a Nvidia GPU and it already suspended and woke up a couple times today (in case this is relevant). Update: The next day, the PC didn't suspend at all & the change happened nonetheless.

• This happened at least 3 to 4 times now - but only once a day. last time it was ~8pm local time, yesterday it was round about ~5:13pm, today it happened ~5:20pm.

I looked if there's any other setting for auto switching themes but it appears like Theme mode = Auto is the only one. And even then, it shouldn't switch to light theme in the evening.

Steps to reproduce

Can't say for others, but for me:

1. Set theme mode to Dark
2. Wait until it automatically changes to auto mode and light theme again

Expected behavior

No random switch to Auto theme mode from Dark mode.

Actual behavior

Switches seemingly random (tends to be in the evening)

Logs / error output

jn7xpjt.log k4pjx0q.log

Noctalia version

noctalia v5.0.0 (v5.0.0-beta.7-30-g19721f1decda)

Compositor

Niri

Distribution

Arch-based

Environment information

Install method: AUR
GPU: Nvidia RTX 4070

Additional context

No response