I have had this same issue. The first time it happened I did a factory reset and it worked for awhile then started doing it again. I finally downloaded a different camera app and it is functioning fine. I hate having to have a different camera app though and lost some great photos.
I will try...
I am SO glad I'm not along with this issue. I've tried everything to get rid of all the crap on my screen. I'm not a techy person, but seriously considering going back to 4.4.4 - I really dislike lollipop. I always thought my android phone was so much better than my friends with the iphone...
I cleared cache, did a factory reset and fully charged my phone. This morning, when I unplugged at 100% it said I had about 5 hours! Ugh! That is terrible compared to what it was before lollipoop. I don't want to have to go through the trouble of reloading kit kat, but it might be worth it...
This is all interesting, but for those of us who are just frustrated with the update and don't get all the technical stuff...Will we get updates in US soon? I'm on Verizon and really want to throw my phone away. So much I dislike about the update.