I just installed the latest version of Connect (v3.15.178) on a new computer. I signed into the app and downloaded an existing survey form that I created previously using a slightly older version of Connect. When I try to publish the survey I get a message that the current feature service is not compatible with the survey. I get this even when I do not make any change to the survey form. So in theory what I download should match the original survey by default. But for some reason it is not compatible and tries to delete the current feature service if I publish.
I'm following this thread for updates, but I have a trick you can try to get you through your issue today.
Everything should be exactly the same, I hope that works for you.