RAFT ensures that data is replicated across a group so this shouldn’t happen ideally. This seems like a bug which I believe should be related to predicate move.
Could you provide some more information about your setup and the workload so that we can replicate and fix this?
Optionally, is it possible for you to share the logs from dgraph zero to see if predicate move happened and the p directory of a server which returns an empty result? Also, share the output of /state endpoint.