The opened application are not redrawn when the panel is moved. They are correctly redrawn when you hover them / selecting that application. Reproducible: Always Steps to Reproduce: 1. Create a panel on the left-side of the screen. 2. Attach an Icon-Only Task Manager on that panel. 3. Open 1-2 applications on that output so that they will be displayed on the task manager. 4. Move the panel to the right side of the screen. Actual Results: The application indicator (blue bar) should now be on the left side of the icon. Expected Results: The application indicator (blue bar) remain on the right side of the icon.
Created attachment 95176 [details] The active focus should be on the left side of the icon.
I've noticed the same behavior on Arch Linux with Plasma 5.4.2.
*** This bug has been marked as a duplicate of bug 354485 ***