Issue with LangGraph Agent Workflow: Sub-Agents Not Following Workflow & Tool Calls Not Triggering

[wadoodnbs]

I'm encountering an issue with the LangGraph agents' workflow, as shown in the attached flow diagram. The core problem seems to be with the behavior of sub-agents such as Signal_Assistant_Agent, Non_Signal_Agent, and FAQ_Agent. Here are the main issues:

Workflow Sequence Ignored by Sub-Agents:

Each sub-agent, like Signal_Assistant_Agent, is supposed to follow a defined workflow sequence, but it appears to be skipping steps. The expected flow is not being followed, and transitions between steps are not happening as designed.

Tool Calls Not Triggering:

Every step in the workflow has an associated tool call, as illustrated in the diagram with specific tool groups like Signal tools, Non-Signal tools, and FAQ tools.
However, these tool calls do not seem to activate when reaching the designated steps. This disrupts the functionality of each agent, rendering the tools ineffective.
Workflow Context
Primary Assistant is the root agent that should direct the workflow to either Signal_Assistant, Non_Signal_Assistant, or FAQ_Assistant based on the incoming query.
Each sub-agent should then engage the relevant tools as per the defined workflow. For example, Signal_Assistant should use Signal tools and transition through steps based on inputs and interactions.
Expected Behavior
Each sub-agent should strictly follow the defined workflow sequence.
Each step should trigger its corresponding tool call.

I am following this example: Customer Support Tutorial in LangGraph.

I'm new to LangGraph, so there’s a chance this issue is due to incorrect state handling on my part. Any help would be appreciated!