HdyHeaderBar dragging breaks often
It's pretty easy for me to get HdyHeaderBar to break while dragging windows around if the content area of an application contains a GtkScrolledWindow. You can even see this in the demo example if you've selected the "Window" demo.
You can reproduce using a touchpad w/ a drag using two fingers (one to hold, the to drag around) and moving fairly rapidly.
Reverting https://gitlab.gnome.org/chergert/gnome-text-editor to not use libhandy does not exhibit the behavior.
Edited by Christian Hergert