On our new iPhone 14 a small window pops up when trying to send a text. It asks which keyboard to use.

Can you please post a screenshot of this popup to help identify what may be causing it?

I see that occasionally when I am switching back from emoji to the keyboard, as I completed inserting an emoji in my text. It does not appear all the time, however when it does, I just tap on the highlighted keyboard in the middle of the 3 in a row at the bottom and everything is fine.