Copy/paste in JTables no longer works on Mac in IntelliJ IDEA 15

One of my plugin's users reported this to me.  Basically I have a custom tool window that renders the results of a query into a JTable.  Traditionally users have been able to copy the table cell contents using standard CTRL+C/CMD+C for paste into other applications.  This is using JTable's standard clipboard support, not anything I added explicitly.  This still works fine in Windows IDEA 15, but I've verified that in Mac IDEA 15, copy/paste from JTables no longer works.  Any idea why this might be and what I might do to restore this behavior for the users?

UPDATE: Actually one of the tables is a JBTable and another is a JTable.  I see the same behavior in both.