System Theme temporarily breaks when closing Fluxer while system is Light Mode then reopening Fluxer while system is Dark Mode

(#3255) Bug Fixed desktop theming

Observed behaviour

System theme on Fluxer temporarily breaks. It remains as Light Mode and when changing it in Settings > Appearance > Theme, Dark theme and System theme will remain as Dark, the two middle themes will change the background to dark, but the text will remain black. Selecting the Light theme will fix the themes and all themes will work properly again, including the System theme.

Reproduction steps

  1. Make sure Settings > Appearance > Theme is set to "System".
  2. Make sure your operating system is set to Light Mode.
  3. Close Fluxer.
  4. Toggle from Light Mode to Dark Mode in the operating system's appearance settings.
  5. Reopen Fluxer.

Build information

Canary Desktop 2026.811.124022, Web 2026.813.222222, Linux 7.1.7-200.fc44.x86_64 (x64), Electron 41.2.2, Chrome 146.0.7680.188, Node 24.14.1, Locale en-GB

Platform

Linux

Details

Expected behaviour Fluxer should have responded to the operating system's appearance settings and changed to dark mode correctly upon opening, just like it does while the change happens while Fluxer is open.
Screencast_20260814_180956.webm | 6.7 MB
  1. Rex changed the status from Needs triage to Fixed

3 comments

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Comment by Tarek
TarekMod 1 vote
Can reproduce Can Reproduce, Canary Desktop 2026.811.124022, Web 2026.813.222222, Windows 11 10.0.26200 (x64), Electron 41.2.2, Chrome 146.0.7680.188, Node 24.14.1, Locale en-US
Comment by Comfy_Deer
Comfy_DeerReviewer 1 vote
Can reproduce CR: Canary Desktop 2026.814.210245, Web 2026.814.173050, Linux 7.0.0-28-generic (x64), Electron 41.2.2, Chrome 146.0.7680.188, Node 24.14.1, Locale en-US
Comment by ternera
terneraMod 1 vote
Can reproduce CR - Canary Desktop 2026.815.4736, Web 2026.814.173050, macOS 27.0.0 (arm64), Electron 41.2.2, Chrome 146.0.7680.188, Node 24.14.1, Locale en-US