Since updating on Saturday all current AND historical average swim pace / auto swim set pace is stuffed inside the Activity App from the Watch data received. (AW4 fwiw). Never had any issues before this. Now my swim pace is a lottery and useless. It appears the auto rest time, which since WatchOS4 (iirc) has been excluded from calculating average pace, is now randomly added to some sets. Dammit Apple. Don't you test this stuff anymore ? Anyone else able to confirm ? There is an off chance this could be watchOS related but I suspect all the data crunching is done inside the iPhone Activity App itself after a swim workout is synced.