Quite often, a fielder near the boundary dives to try to stop the ball, and in the process pushes the boundary rope further away. I have never seen the boundary rope being restored to its original position.
This will put the batting side at a disadvantage. If the batsman plays another shot to the same place, the ball has to cover longer distance. Nowadays, it is also a common sight for a fielder to take spectacular catches close to the boundary, so that little push to the boundary rope can make a drastic difference.
Nobody seems to care about this issue, even the commentators don't consider it worth mentioning. What is the reason for ignoring this issue?