Fenix 5 Plus Golf App - Measure Shot

I went out for a round of golf with my new 5 plus and I can't figure out how to record shot distances. I choose 'Measure Shot' and then I get a message saying to take a swing to start the measurement, but it simply doesn't work. I've tried swinging before and after selecting the message but it just doesn't work. Are there any golfers out there with some tips on how to reliably measure shots?

The ability to measure the distance between two points on the golf course is a critical feature that I rely heavily on and without it I'll have to switch to my old S3 when I golf.