Incorrect calculation of playing handicap messing up my stableford score

I golf a lot, mainly in the Netherlands and noticed that on many (but not all) courses, the playing handicap the watch uses for Stableford scoring is 1, 2 or sometimes even three strokes off.

My scoring settings are: Stableford and Index Slope.

This causes the following issues:

  • During the round I don't get accurate info on how many additional strokes I receive
  • During the round, I don't get the correct points accumulated for the holes played
  • After the round it gives the incorrect number of stableford point
  • After the round I have to adjust the scorecard settings in the golf app to correct the scorecard

Is this a problem with the course data?

I am not prepared to adjust the playing handicap for every round. This is a €350 watch and it should be extremely simple to make this work is the course data is correct...

Thanks for your help!!!