I have migrated our development environment from java-10 javafx to java-11 and openjfx-11.
One thing I have noticed is that windows opens on the top left corner of the screen and than moves to a center location. The weird thing is that we can see the window moving. It appears to be a glitch. This also happened on java-10 with the bundled javafx when setting it to use gtk-3 instead of gtk-2. So it appears to be a gtk-3 bug/glitch. We use x.org (not wayland).
