Inactivity Timeout restart while rejoin the chat with same name and number.

Login to the agent makes it to ready state.
Initiate the chat from the customer with Name: Hamza, Phone No: 03366115142.
Send Hello message from the agent, the inactivity timeout starts.
Close the customer window.
Again initiate the chat from the customer with the same Name: Hamza, Phone No: 03366115142.
The inactivity timeout restarted.