When a customer terminates the chat the agent console gives the error

Content

When a customer terminates the chat. The agent console gives the error (attached as well).

Cannot release lock without holding  a lock.

On the error screen, after clicking on send button, we get the message (attached) and then the screen hangs. And then the agent has to end the application through task manager.

Note - We do not have wrap-up option on our chat workspace.

What could be causing this issue. How to get it resolved.