Duplicate Releases Sometimes Created

Using the recommended setup, I sometimes get duplicate releases created for the same tag. Perhaps a race condition?

This ends up with some artifacts uploading to one and other artifacts the other, requiring me to delete the releases and re-run the CI. Perhaps there's an atomic way to do the check/creation step?

Note: I thought this was a total fluke the first time it happened, but I've seen it 2 or 3 times now with https://github.com/yaakapp/app (78 releases)