I know this was an unsolved bug in the 955 series, and now I've got the same message in my 965; it's been since probably 4.19 I've had problems with navigation (i.e. navigation back to starting point using a route the watch was not even showing the road but just a straight blue line) and yesterday I've got this message when asking to the watch to calculate a roundtrip of 8km. Anyone has the same, and anyone maybe has found a workaround for this?