Trying to use the model builder and when I add a field it works. Then add a second field and in the middle of typing some lines, it disappears. It seems like your auto save functionality is causing more issues than it helps. It would probably be better to just have a save button and a prompt if you leave a page without saving.
I started building an api path and added headers, query parameters, etc. When I click on the server button and make a change and go back, half of the things I entered are gone. It’s done this several times.
So far, this isn’t usable. I keep losing data.