Customer experienced this issue in Quay 3.3

Steps to reproduce in Quay.io.

1. Create and build image locally from simple Dockerfile containing one line: "FROM alpine"
2. Push to Quay.io: "docker push"
3. Use curl to check SchemaVersion and digest. Attachment: curl-originaltag.txt
4. Create a new tag from the pushed one in Quay UI.
5. Use curl to check SchemaVersion and digest. Attachment: curl-newtag.txt

SchemaVersion in newly create tag in UI is "1" and digest is not the same.