I have an 2017 SQL Server on Windows 2016 boxes. When rebooting the secondary nodes while their Replica Role is Secondary, some of the databases in this AG groups are showing Synchronizing after rebooted. They remain Synchronizing for days. I checked the logs and didn't see any errors. The affected databases are random. To resolve this, i just restart the SQL Server Services and all the databases in the same AG group become synchronizing again. Sometimes, i have to restart the SQL Server Services multiple times. I am not sure what is causing this problem or where to look at. I check the database log, system log, and didn't see any thing related to why they are not synchronizing. I was wondering is this a bug?
Updated:
1) System are patched with the latest CU 11 as of today.
2) The secondary nodes are in Synchronous-commit mode
