Thank you for the follow-up and the strong warning!
Admittedly I’m a bit confused as @graham.pople suggested this here: Retrieve xattrs._sync.rev via n1ql, Java SDK or admin rest api - #2 by graham.pople
As far as I understand the function uses the metadata which is stored outside of the document itself. I’m on Couchbase 6 and SG 2.x. So now it’s possible to edit documents via Java SDK (and SG REST API) and the changes get synced down to Couchbase lite clients. And as far as I know this was not possible in earlier versions. Not sure about bucket shadowing; I never used it.
Looking forward to some clarifications and a recommended way to get the latest revision of an existing document!
Thanks!