I have tested this, EXTENSIVELY, since beta and put in several tickets regarding it. Zoning will cause you to lose all of your stats, as will logging out of the game. On occasion, cinematics will cause it, too. My character still had most of their social gear until about level 25 and it was a loss of about 120 from my primary and secondary stats. Honestly not sure why this is so very difficult for them to figure out as I've provided extremely detailed steps for the fix to this. I will, however, strongly vouch for the issue. It became a guild joke that I had to make sure to strip naked every time I logged on or changed zones, so that I would do any damage.