Also on GCS, if you do a HEAD after DELETE on a bucket that is under lifecycle management it returns 200 instead of 404. Not really a consistency issue but it can really come and bite if you if you're not aware of it. GET returns 404 but HEAD returns 200.

I reported it as a bug but Google said it was by design. More specifically they said: "You are correct, if the versioning enabled in your bucket then the object metadata is saved as an archive object in the bucket [1].This is the reason you are getting 200 for your HEAD request."