Reference point app freezes on instinct 2x

Hi everybody,

my instinct 2x (13.21) has this issue: 

When a reference point has been set, the app freezes about 10 seconds after it's got a gps fix. Sometimes it happens that the compass will do 360 degree turns at a steady speed forever. The distance is still frozen regardless of moving towards or away from the point. Leaving the app and starting it again produces the same result after a few seconds.

Restarting didn't help.

Any suggestions would be appreciated.