Tim Payne

This is the older v7 provider, I don't know if Elijah's still maintaining it, but there's a V8 version that's forked from this one: https://github.com/DannerrQ/Umbraco-S3-Provider

There's a bunch of other places this occurs as well. For example, if you cancel a member save, you get a success and a cancel message. If you you cancel...

Quite old, 8.5.3! Looks like it got broken at some point between then and more recent versions. I don't have any V8 sites on in between versions to check on...

Compare that against the version on our version that's broken?

Our version is identical to that! As was the previous version of the site where it worked.