I’ve not has this issue yet. This can be caused by cutting the bacon unevenly so some are too short to wrap the bacon making difficult for the bacon to get sealed as it cooks and shrinks. If this is the case, you can secure the tater tots with toothpicks. Insert a toothpick through the bacon and into the tater tot to hold it in place. Insert in such a way that the toothpicks eventually serve as the serving sticks.