Input source missing from time to time
I have three input methods. From time to time, I cannot do control + space to switch between input methods. Then when I check the top right icon, some input methods are missing even they are already there in the Keyboard setting menu. Anyone knows how to prevent it from happening? It is very annoying that I cannot switch input methods.
I am using MacBook Pro (13-inch, 2018, Four Thunderbolt 3 Ports)
Mojave Version 10.14.6