Can someone explain why Sky racing show full screen of harness horses just circling before the start but as soon as they start to score up they switch to split screen so that punters can't see what their horse is doing ! Often the other half of the screen just shows an empty track or dogs or gallopers walking to the boxes.

I want to see the score up and first 20 meters of the race in full screen as I'm sure most people do. I wonder if David Martin could get some answers from Sky about this policy.
I know watching on trots vision will avoid this problem but my internet and phone have problems with freezing on their site.