Created attachment 144727 [details] Comparison of task panel/switcher icons for Breeze and Oxygen SUMMARY The task switcher shows Breeze icons instead of default/Oxygen. STEPS TO REPRODUCE - Set Global Theme Breeze (any color variant) - Set Oxygen icons - Make sure your task switcher shows app icons (set i.e. "Big icons") - Make sure your task manager panel shows app icons - Start Krusader, start LibreOffice - Invoke task switcher by pressing Alt+Tab - See the icons... EXPECTED RESULT App icons on both task panel and task switcher should respect selected iconset. Basically they should be the same. OBSERVED RESULT See attached image... Whereas I can see the original icons (apps' built-in or Oxygen?) on the task panel, the task switcher shows different (Breeze?) icons. BTW: The same confusing icon is shown as the "window icon" in the windows' upper left corner. SOFTWARE/OS VERSIONS Operating System: KDE neon 5.23 KDE Plasma Version: 5.23.4 KDE Frameworks Version: 5.89.0 Qt Version: 5.15.3 Kernel Version: 5.11.0-41-generic (64-bit) Graphics Platform: X11 ADDITIONAL INFORMATION I can see this confusing behavior for few weeks only since Plasma 5.23 (not sure if exactly since 5.23.3, but definitely in 5.23.4). To bring even more confusion here, this bug affects only some apps - namely Krusader and LibreOffice. KDE family apps (Dolphin, Konsole, even Kate) adjust their icons in respect with the iconset chosen. What is the difference?
Although I understand Nate's explanation in bug 433315 Comment 2, I do not understand such UX. Having different icons on task switcher vs. on task panel is super confusing. Now yet iconset-dependent.
*** This bug has been marked as a duplicate of bug 351055 ***