Comment 4 for bug 1530609

"ubu" is deleted with backspace key-strokes, which can get lost as well as any of the subsequent "Ubuntu" key strokes. Gedit isn't affected because Onboard doesn't use key-strokes at all in GTK-3 widgets, but direct text insertion.
Please try the suggestion. If I get enough feedback about the delay people need in Firefox then I might be able to add one by default.