Keyboard typing keeps creating a double ii

In order to isolate hardware, open apple logo > system preferences > keyboard > tick show keyboard and emoji viewers in the menu bar.

On the upper right corner, you will see a calendar like app with the command symbol on it, click it and show keyboard viewer.

Now, use the onscreen keyboard in typing.

How did it go?

Go to Apple logo, system Preferences, keyboard, click shortcuts, see if there is a shortcut in there involving your ii situation. If there is, select it and press the “- button” (minus button).

If that doesn’t work, don’t bother replying to me because I have no idea what else it could be.

Sounds like a sticky key, is it the same across all apps or isolated only to one app?

Does it happen on all the keys on the keyboard?