I am facing the proplem with powerApps. Whenever I have edit my exitsing connection(Custom Apis) it will come multiple time with same name and giving the error perameter value missing. Polease do needfull.
dws, could you clarify how you edit the existing custom Api ? Do you upload a different swagger?
I didn't notice anything wrong with the swagger you provided and I was able to create a custom api just fine, and updating it also worked.