Looks like it is trying to save the work item but lost the lock before doing so. You need to trace the file listener to understand in which step it is loosing the lock. You might want to trace by enabling the lock setting in the tracer. Mostly lock of the work item get lost if you manually commit in the flow or activity.
We couldn’t find any error message/exception related to Listener failure in the logs except the one that I have provided in the attachment.As the listener monitoring solution is not currently available @ PDC/AES,could someone please provide the best use cases to track down the listener activity.
AS Saikat mentioned enable 'Locking' in tracer settings. You can trace the service File rule to actually trace the file listener. Pega generally releases lock after commit in flow i.e. when an assignment shape is reached. In your case check what activity catransfertoworkbasket step 20 is doing. A possible fix could be using Obj-Refresh-And-Lock but it will refresh clipboard page.
When the listener fails, is there a specific exception thrown? Platform does not provide alerts for listener failures but we are enhancing PDC to recognize certain exceptions and give advice on how to take action - and even offering notification scorecards for specific issues. Latest build of PDC has "listener status" in the enterprise health dashboard. There is a new version of AESREmote ruleset that will be released as a hotfix for 73 and 74 that sends PDC agent status, agent queue depth and listener status; at some point we will add options to configure "expected listener" status and detect variance.