Installing updates on top of updates on top of updates can eventually cause problems, so a factory reset might be on the cards, but first look at your apps to check they’ve been updated to lollipop.. Lollipop apparently introduced a memory leak that can cause problems all over the place. closed apps will pop back into existence in the background, navigating apps can become laggy, and sometimes. Geoff from http://geoffmobile.com talks about his problems with the stock calendar app in android lollipop 5.0 and why he switched to a third party calendar app.
Problems with latest android update lollipop wifi connectivity it seems that we can't have an android latest operating system version upgrade without something failing with either wi-fi, wireless. If you encounter the problems whilst in safe mode this would indicate that you probably have a bad update and should refer to #2.7 in post #2. #1.5 user apps: wiping cache, data and uninstalling sometimes a particular app or apps that you have installed, are causing problems and are shown to be doing so, on the phone.. Battery issues. battery issues are rumored to have held up the roll-out of lollipop and it looks like google wasn't able to squash all of the bugs before the new operating system saw the light of day..
