Created attachment 128241 [details] bug I found a bug in the plasma browser integration. Put 20 downloads to download and close all windows quickly, which appears below on the right side. OBSERVED RESULT Part of the rectangular window is invisible, leaving a trail. EXPECTED RESULT That the window is not invisible and can be touched. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: Kernel-5.6.10/ Plasma-5.18.5 (available in About System) KDE Plasma Version: 5.18.5 KDE Frameworks Version: 5.69.0 Qt Version: 5.14.2 ADDITIONAL INFORMATION