Hello
I am running into a confusing issue on SQL Server 2019 where a scheduled SQL Server Agent job fails with permission / object errors but runs perfectly fine when executed manually via SSMS. 
The job calls a stored procedure that handles data processing and logging. When triggered by the schedule; it often fails on simple queries or log insertions that should have no permission issues. 
I have verified the job step is using the correct proxy account & that the SQL Agent service account has access to all necessary resources. There are no hardcoded file paths / external resources being accessed. 
It feels like the job runs in a slightly different execution context when scheduled; even though everything looks identical in the configuration. 
Checked SQL Server Agent Job failure - Microsoft Q&A related to this and found it quite informative.I even double-checked some logic like I would when reviewing what is pl sql just to rule out any procedural issues in the stored procedure.
Why would this job behave differently based on how it's triggered? Is there a known difference in environment context, permissions, or isolation for scheduled jobs vs manual execution? Any insights or similar experiences would be appreciated.
Thank you !!