Hi,
I wonder if the lock entries are there for one hour. It would be logical that at transaction end the locks are released as soon as the V3 update records are written to the SM13 update queue. I can imagine they will be locked again during extraction. But why the lock would exist in between (also because the originating transaction and the V3 processing are totally different processes)? Did you analyze how long and at which moments the locks exist?
Anyway, I expect that it will be a general SAP Basis problem. Have there been any changes the past days? Is the number of total processes (e.g. background processes or update processes) changed?
I agree that it is strange that it works well for 1.5 years and the last 2 days not anymore...
Best regards,
Sander