After you restart the server instance, a role change event that was published during the online process is affected by a logical timestamp change. The original event that was published by the transition from "primary pending" to "primary normal" is changed by the transition from "primary normal" to "global primary." However, the transition from "primary normal" to "global primary" does not publish the event to the DBR subscriber. Therefore, some databases are not fully started. This issue applies only to distributed availability groups. If you are not using distributed availability groups, this issue should not affect you.
Article ID: 3173989 - Last Review: Jul 26, 2016 - Revision: 1