Created attachment 137187 [details] Video that illustrates this issue SUMMARY When Qt windows with Breeze style and new color scheme transitions to/from active state, its "header" area and window title change background color. Colors are the same, but their change is not synchronized (window title color changes first). It looks somewhat jarring. STEPS TO REPRODUCE 1. Open two windows with header areas side by side 2. Switch between them, and pay attention to how header/window title colors change OBSERVED RESULT Windows title color changes before header color. EXPECTED RESULT Header and window title color change simultaniously. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora 34 (available in About System) KDE Plasma Version: 5.21.3 KDE Frameworks Version: 5.80.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION I've attached video that illustrates this issue.
*** This bug has been marked as a duplicate of bug 433569 ***