This could be operator error so I'm hesitant to say it's broken but, my Fenix L2D Q5 seems to have lost it's ability to do more than one of it's "fully on" modes and strobe. I press the tail cap button and the light comes on, I half press the button and it shifts to strobe. I can only switch between those 2 modes. I turn it off, and repeat, and I get the same results. Any ideas what's up? Any quick fix ideas?