It is infuriating when the kids drop items or freeze. Although I especially experience it in the bottom right corner, I have had similar glitches at other spots. I could stand it except when I lost a red mushroom and two different unusual items that I hadn't collected yet. I hope there is going to be a fix for this, because it would be pretty boring waiting for points etc. except for the fun of spotting mushrooms and items and grabbing a kid to capture them.