I have a legacy Lotus Notes application that starts to randomly lock a document even though no one is opening the document. So when someone tries to edit a document, Notes will say that 'the document is locked by user1/Domain' but when I check with user1, the person does not have that document open and the admin or the user1 has to manually right click the document and select 'Unlock document'.
What would some suggestions to try to find out the cause of this problem?