Average swim pace dashboard is wrong

I have tried to create some dashboard data for pool swimming to see how I'm going over time.

In an individual swim, the average pace is reported correctly - moving time per distance.

However when trying to create a dashboard graph the points are all plotted as total time per distance. This is completely useless, I do not want to include rest time in my pace tracking. I cannot see any other way to change this, am I missing something or is this an error on Garmin's part?