Umpire over ball

[Suudy]

I was at the WSU/CU game yesterday, and often the U would come up and stand over the ball after the RFP. With the timing rule change a couple of years ago, i.e. 40 sec play clock, the play clock is already running. WSU runs a no huddle, and the U standing over the ball halts the offense. Occasionally the play clock would get dangerously low. Why is the U standing there after the RFP? Is there some new mechanic/rule?