"Show More" of a Match While adding a movie to a match

I filled out all the stuff and wrote some gushing prose for a movie I was adding to a match , and then down at the bottom where it shows the corresponding match, it has that “Show More” button. Of course I wasn't thinking but I was curious … so I clicked it.

Boom! There goes all that work I just did ?

I won't do it again, but it's frustrating … and it might happen to someone else