A update to Ubuntu received today seems to have fixed the issue.
---
$ less /var/log/apt/history.log
Upgrade: gedit:amd64 (3.28.1-1ubuntu1, 3.28.1-1ubuntu1.1), libgweather-3-15:amd64 (3.28.1-1, 3.28.2-1~ubuntu18.04.1), gir1.2-gweather-3.0:amd64 (3.28.1-1, 3.28.2-1~ubuntu18.04.1), gnome-shell-common:amd64 (3.28.3-0ubuntu0.18.04.3, 3.28.3-0ubuntu0.18.04.4), gedit-common:amd64 (3.28.1-1ubuntu1, 3.28.1-1ubuntu1.1), gnome-shell:amd64 (3.28.3-0ubuntu0.18.04.3, 3.28.3-0ubuntu0.18.04.4), libgweather-common:amd64 (3.28.1-1, 3.28.2-1~ubuntu18.04.1)
I'm no longer able to reproduce the issue.
It seems to have been fixed by this patch: https://bugs.launchpad.net/ubuntu/+source/ibus/+bug/1765304
A update to Ubuntu received today seems to have fixed the issue.
---
$ less /var/log/ apt/history. log
Upgrade: gedit:amd64 (3.28.1-1ubuntu1, 3.28.1-1ubuntu1.1), libgweather- 3-15:amd64 (3.28.1-1, 3.28.2- 1~ubuntu18. 04.1), gir1.2- gweather- 3.0:amd64 (3.28.1-1, 3.28.2- 1~ubuntu18. 04.1), gnome-shell- common: amd64 (3.28.3- 0ubuntu0. 18.04.3, 3.28.3- 0ubuntu0. 18.04.4) , gedit-common:amd64 (3.28.1-1ubuntu1, 3.28.1-1ubuntu1.1), gnome-shell:amd64 (3.28.3- 0ubuntu0. 18.04.3, 3.28.3- 0ubuntu0. 18.04.4) , libgweather- common: amd64 (3.28.1-1, 3.28.2- 1~ubuntu18. 04.1)
---
I'm no longer able to reproduce the issue.
It seems to have been fixed by this patch: /bugs.launchpad .net/ubuntu/ +source/ ibus/+bug/ 1765304
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