Hi @Alex Thompson ,
Do we put SSRS on both servers in AG, or does SSRS need to be installed on a 3rd server which then leverages the listener name for connection.
No,you don't need do that. When you mainly add a database to SQL Server Always On Availability Groups, check "Full".
For more information,please refer to: SQL Server Always On Availability Groups for Reporting services database.
Step-By-Step: Creating a SQL Server Always On Availability Group
Your issue is more database-related. I suggest that you choose to add "sql-server-general" to questions in this area, and more professional people will answer for you.
Best Regards,
Joy
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