Recently my GPS tracking has been playing up with MapMyRun, not tracking me properly, turning 5k runs into 20+k runs, telling me I've run 10s kilometres etc etc. I've tried resetting the network, turning location services off and on, making sure location set to always for MapMyRun, soft reset, and now tried two other running apps which both do the same thing. Today I've just been on google maps and my location keeps flicking back and forth from my current location to somewhere about half a mile away or so. Anyone know what the issue is, whether there's a fix, or if it just means a visit to the Apple Store? Any help appreciated.