While creating a tag via the swagger UI, I thought I had broken something then realized the button to 'save' said "Cancel" (see attached). I asked the team and they believe this might have been the result of a general change to swagger and was not intended/as designed when the tagging portion of the API was created.
Steps to repro:
1) Go to the API, tagging section
2) For create a tag, try it now
3) Edit the body. You'll see "Cancel" to 'save' (i.e. if you edit the body then "Cancel" your changes will be the new body).