It's now 3/20 and the issue still exists for us.  Was there a fix in an update?  I've updated and repaired updates and still have clients  locked on one workstation but not on the others.  Using the same data file on our server.  Here's a curiosity: files locked by one user before March 2 are unlocked on other users' workstations.  Files locked after that are locked on all.  We've all updated many times since then.