This unfortunately is a known bug which is very hard to reproduce - sometimes it always happens, sometimes the issue vanishes. Last time I had it, GNOME Software was the only application that was affected by this. I linked the corresponding upstream bug.
** Bug watch added: GNOME Bug Tracker #756668 https://bugzilla.gnome.org/show_bug.cgi?id=756668 ** Also affects: gnome-software via https://bugzilla.gnome.org/show_bug.cgi?id=756668 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-software in Ubuntu. https://bugs.launchpad.net/bugs/1554117 Title: gnome-software search bar duplicates letters while typing To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-software/+bug/1554117/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
