Since i installed the update last month, every freaking time my m8 crashes I lose my settings. I have even lost my home screens, days of mobile bookmarks that went unsynced (wtf). I can't confirm that this happens every time, but usually it will say "optimizing apps" when it restarts after a crash. I also usually have a crash when the battery gets less than 35%. I am on an unrooted verizon trash m8.