mine had a different sort of issue where the phone will reboot when charging or left untouched. i have now moved on to build 103 and havn't faced this issue again
Had those problems, then anniversary update arrived and I updated and hard reseted the phone without restoring backups. I also bought a new sd card, in other words, I started from scratch.
Now it works like a charm. Before mine also discharged about 40% during night, now it's about 1-5%. Also almost all other problems I had are gone.