A typical problem with the elevators on the ships is that there are four elavators and they're controlled by pushing one of the two sets of buttons to signal that you want to go up or down.
You might push the button closest to you on the right side of the waiting area and the elevator on the far left might be the one to arrive. In order to watch all of the elevators, you'd have to stand farther back from all of the elevators and then be prepared to move briskly to the one that arrives.
On our Jan 19th cruise, I remember noting that one of the elevator banks that has a floor indicator above the doorway of each one wasn't working correctly or else it was stuck. But I can't remember which bank it was on.