Comment 1 for bug 1756013

The main problem is that Onboard was not designed to work with GNOME3, that has restrictions, that Onboard can hardly bypass. (Onboard is also incompatible to Wayland, which is an additional issue.) There is a gnome extension for Onboard that slightly improves the situation, but a proper compatibility with GNOME 3 requires Onboard to be rewritten, having the restrictions of GNOME 3 in mind. A rewrite of Onboard started some time ago under the name of OnboardOSK; but I don't know what state OnboardOSK is in.