Created attachment 114746 [details] demonstration Watch the screencast recorded on Arch Linux please.
Can you run it from the terminal and tell us if it shows any errors? This is very weird.
Terminal shows no error. Bug is also reproducible on neon dev unstable.
Can confirm, also happens on kalgebramobile so assigning to kirigami.
Git commit 3ade4022be52d4e95626b1d9a15c04ed758fad70 by Marco Martin. Committed on 04/09/2018 at 13:58. Pushed by mart into branch 'master'. explicitly set an height for overlayDrawers M +6 -0 src/controls/templates/OverlayDrawer.qml https://commits.kde.org/kirigami/3ade4022be52d4e95626b1d9a15c04ed758fad70
Still reproducible in plasma 5.14. To reproduce: after you open unmaximized Discover, maximize, unmaximize and maximize its window. Operating System: Arch Linux KDE Plasma Version: 5.14.0 Qt Version: 5.11.2 KDE Frameworks Version: 5.51.0
Cannot reproduce. Operating System: Arch Linux KDE Plasma Version: 5.14.4 Qt Version: 5.12.0 KDE Frameworks Version: 5.53.0