I have the reverse problem - I only get PRs from lap swimming not from Open Water swimming - do you get any swim prs showing - also what device are you using - I have a 935
My device is forerunner 35. I'm recording the activity as "cardio" and changing through the app to "lap swimming".
Why it's a device related issue if PRs could be added manually in GC? (I understand that the device displays PRs as well, but it's should not be dependent for central app statistics)