In a drive to outperform others, you may find joy in doing more than what’s expected from you at the moment. It means that you are still expected to deliver the same thing but later.
But because you want to be recognized that you can go beyond without seeming stressed, you are welcome to do so.
Perhaps, in that way, you find the energy to do work without getting a bad attitude towards it.
Sometimes a spirit of competitiveness helps you move further. But when you go over the top of stepping down on others just to get ahead, then that would be a problem.
You become a problem.