I have configured two agents -
Agent A is an advanced agent which calls an agent activity A. Agent activity has the queue-for-agent method which calls the Agent B.
Agent B is configured as a Standard agent which calls Activity B which has the core logic to be performed.
Checked SMA and see that both agents are running fine, with auth and bypass checked. No events occur on trace of the activity when tried tracing directly on the node that it is running in.
Checked the logs and no errors there too.
When running the agent activity stand alone, it works perfectly fine.