Could it possible be that the delay in live coverage is a built in planned safety item like happens with some other sports and news programs so that if something untoward like a very bad accident happens they have time to switch to something else and not show what actually happened in live coverage.
As an example should a fatal accident occur should that be in full up to the second live broadcast.

Imagine people sitting at home seeing the car of a family member or friend disappearing over a cliff into a river with the live broadcast of them in the car still running for them and the world to see.
Imagine how you would feel if you had to sit there and watch that.

I know what I felt watching Hayden and John live when they had their accident at the beginning of last season and if you are observant you will have noticed that the delay has been in the system since that event

I think that a delay system is very responsible on any live broadcast.