Sometimes, not always, taking a picture will shut down my N5 suddenly and it will NOT boot -- nothing happens. This happens regardless of batterly charge level. I tried the simultaneous Vol up, Vol down, and power button, but it won't revive. But if I stick it on a charger, wireless or otherwise, for a second or two, then it will boot and battery shows normal. I have a new battery, it's not rooted and running latest Android (6.0.1) and Feb 1 security update. Any ideas on resolving this annoying problem (I now carry along a power bank just to recover from this problem)?