Since a11f417cd0f9876b6e00731a6e39665d0103336f, both drag and scroll gestures are added to Main.layoutManager.overviewGroup actor, while previously drag gesture was added to Main.overview._backgroundGroup instead. Since we cannot use 2 different actors for dragging and scrolling anymore. just disable the swipe tracker while dragging a window. https://gitlab.gnome.org/GNOME/gnome-shell/issues/2151
GNOME Shell
GNOME Shell provides core user interface functions for the GNOME 3 desktop, like switching to windows and launching applications. GNOME Shell takes advantage of the capabilities of modern graphics hardware and introduces innovative user interface concepts to provide a visually attractive and easy to use experience.
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