To reproduce, run webui example, minimize it and restore it. The window becomes white and does not repaint until resized.
Apparently has been an issue at least since Qt 5.12.6 and can be reproduced on Gnome desktops (RHEL, Ubuntu), but works with some WMs.
|For Gerrit Dashboard: QTBUG-104763|
|426762,2||Add workaround for un-minimizing QWebEngineView under Gnome||6.3||qt/qtwebengine||Status: MERGED||+2||0|
|426955,2||Add workaround for un-minimizing QWebEngineView under Gnome||5.15||qt/qtwebengine||Status: MERGED||+2||0|