We've got a ZD integration at work. Lately a lot of our customers have notified us that their article publishes haven't gone through. Upon investigating, we noticed that we sometimes would append extra slashes in the url, such as xxx//api/v2//help.
This has not been an issue before, but now we're getting 404's (which is understandable).
I am just curious, have you made any recent changes that could have affected this?
This is most likely due to one of the backend services tightening up the routes they accept and not a change to the API. This would have been considered unexpected behavior most likely (accepting not incorrect api pathing) so fixing this would have only notified customers who reported the bug.