I recently flashed this Dropbox zip (50GB back) through TWRP and since then, everything has gone downhill for my phone. Battery drain, random reboots, etc. I've tried to reset my phone and clean installed everything (wiped data, factory settings, etc.) but the problem has been the same. My question is, if I restore to a backup I had a few months ago, will everything that I installed after that backup be erased so my phone can go back to normal?