I recently purchased a new Eotech EXPS 3. I put it on my SBR'd 556. After about 50 rounds I have had issues where the red dot spontaneously shuts off. I changed the battery, but i doubt that is the problem, since the Eotech powers up fairly quickly when I hit the on button. The bright/dimming function works well and the red dot is normal. The problem occurs about every three fired rounds. Do I have a loose connection and need to send this in to Eotech for an eval?