iPhone 12 Pro Max, replying to individual messages, unable to go back..

I hope this hasn't been answered already, I did try to look, but I just got the new 12 Pro Max (woooohoo) loving it so far. However, when you are in a text message, using the new feature to reply to a specific text, I don't see a way to go back to the main thread. No X, no back button, nothing. All I've had to do so far, is just close the texting app entirely, and get back into the app.

Any advice, suggestions, solutions...? Or is this just a design flaw?