In an environment with SQL Server 2014 (there are practically even this version still in use), I routinely checked for databases that had the TRUSTWORTHY property enabled.
I stumbled across a database that is included in an AlwaysOn availability group (readable secondary replica). For this database the master.sys.databases of the current primary shows a value of 0 for is_trustworthy_on, but on the secondary, is_trustworthy_on is 1.
How can this be? Is this a bug?