[BUG] Trivalent doesn't switch to dark mode with system on KDE

[HastD]

On my system running secureblue (kinoite-main-hardened:br-next-43, version 43.20251030.0), Trivalent is set to use the "device" theme for light/dark mode, and therefore should switch themes when the system does.

When switching the system theme from Breeze Dark to Breeze (the light mode theme), this works fine: Trivalent immediately switches to light mode.

When switching from Breeze to Breeze Dark, however, Trivalent flickers into dark mode for a fraction of a second but then immediately switches back to light mode. Trivalent does correctly start in dark mode after restarting the browser.

This does not happen with layered Google Chrome, and was not happening until very recently (I think it started with the update to Trivalent 142). Things I've tested:

• Starting with a fresh Trivalent config and cache does not fix it.
• Switching SELinux to permissive mode doesn't fix it.
• Removing my Trivalent policy.json doesn't fix it. (None of the policies seemed relevant but I tried it anyway.)