Yes, but... SELECT ... FOR LOCK is _pessimistic_ locking and EOF should be using optimistic locking. If EOF is issuing pessimistic locking SQL, then something has gone wrong.
Maybe log the SQL and then compare what WO is looking for with what is actually in the DB? That is not the issue. The important symptom is that EOF is doing a SELECT ... FOR LOCK. Didn't you see this when you were using <cough> Vertical Inheritance?
Maybe log the SQL and then compare what WO is looking for with what is actually in the DB?