So this morning I received a notification about a new security update for 5.1 with patches up to march 2016.
Pretty impressive that Moto still pushed this out for a phone launched in 2013
So far Good good ones are : Stock sms & chrome,playstore,quick office (basically all google apps) good in landscape
Crashes: Whatsapp,Skype,Javelin Browser , Facebook messenger,Pushbullet
I encountered this exact problem on my G...after much headaches and fidgeting with settings....decided to simply reboot and re-use the moto website to ring youmy device again & after unlocking your phone the beep should go away :D