Recorded tines different to audio cues
I've been using strava for a couple of years to track my runs. I've also used audio cues and these have always agreed with the completed split paces ince I've completed and saved the ring. However in the last couple of weeks the recorded splits are totally different to what I'm actually running. I'm averaging 9 mins a mile but the split pace is showing around 11 mins! Can anyone shed any light on this please?