Comment 12 for bug 1755831

I have tested and confirmed that the package budgie-desktop-environment_0.9.9ubuntu1 has solved this issue. The "IBus Preferences" option now shows under the menu, and I can add the input method icon by checking the "Show icon on system tray" option. Once the icon shows up, I can now add new input methods through "IBus Preferences" and have them show in the list of available input methods. Typing in additional input methods is working properly too.

Changing the tag to verification-done-bionic.