JetBrains IDEs have a default setting allowing open Search Everywhere window with double shift. It is often annoying with Chinese IMEs. I’d better turn it off.
In JetBrains IDE, press Command + Shift + A to open Search Everywhere Options window, and search for “Registry…”. In the opened window, check the “ide.suppress.double.click.handler” item, and close the window.
Now the world returns to peace, isn’t it?