There needs to be an area where you can stop, which doesn’t affect your overall lap times. e.g. Have the finish line, a neutral area and then the start line.
In Watopia you can kind of do that by crossing the line, then u-turning back across the line and then u-turning again to come back. But that’s a kludge
In Richmond you can’t u-turn so 2 minutes to go and fill up with water meant the entire 10 mile lap was recorded as slow.