The past few weeks, about once a day, Siri stops working. For example, when I ask it to play an artist, it comes back with "Sorry, my name, I'm having trouble playing your music". Other times, when I ask it to make a call it comes back with "Uh oh, something's wrong. Can you try again". It is not a signal issue. When it happens, I have plenty of LTE signal and it even happens on wifi. A reboot always cures the issue. Any thoughts?