Just thought I'd report this, will send to beta team once I find the email for them.
Pool swimming seemed to be pretty good up until v7.00.
Pool length 50m
Pool length setting 50m
Swim stroke detection on. I have found turning this off can improve the recording, Im sure my swimming stroke is not elegant enough.
Swam 1000m
Watch recorded 1800m. Seems way to far off, almost like it was set to 25m.