Today, I tried to switch input methods using Super+Space, and it landed on mozc with a grey "Mo" icon. I cannot remove this input method in Text Entry Settings. Is there a fix for this bug?
I figured out the answer to this:
First, install dconf-editor sudo apt install dconf-editor
dconf-editor in the alt+f2 popup
org.gnome.desktop.input-sources remove the missing input method from