Changing Text in Pages

OS Sonoma 14.6.1

So I don't know when things changed in Pages but -

In the past when I highlighted a word as above, I would simply start typing the replacement word that I wanted. Now, as soon as I begin typing I get this confusing mess -

I have no idea what this is and have no need for it. Is there a tweak somewhere that would prevent this dialog box from showing? Thanks.