Make sure their staying dark with no light leaks for 12 hours, this causes most of my hermie issues. I'll bump into a timer and fuck it up, and not notice till a day or three later, sucks. It is a hermie though. If you have plenty of plants going kill it, and pluck it off and watch it closely. I have tried the pluck and watch method a few times and always end up finding more balls and end up killing the plant.
Good Luck