Thanks for trying out the Couchbase Server 7.0 Beta build. I am assuming you are using the 7.0.0-3739 build. This issue was present in 7.0.0-3739 build. We have recently refreshed the Beta build on our website, and are now offering build 7.0.0-4602 for download. This build has the fix to the issue you are seeing. It would be great if you can download the latest from NoSQL Database Download | Couchbase 30-Day Free Trial and try out once again. Please let us know your feedback on this issue.
Regards
Mihir Kamdar
Sr. QE Manager
Couchbase Inc.