Not secure lightweight food
The air fryer's ability to produce healthier versions of treats like chips is a major selling factor for certain consumers. But after removing a few burnt kale chips from the heating element, the honeymoon is over, to put it mildly. The air fryer is a convection appliance, which means it functions by circulating hot air. The meal is placed in a basket with holes on the bottom so that air may flow over the french fries, chicken patties, or whatever you're eating. If everything goes as planned, the hot air will color the meal and make it crispy.
But "air" is the essential word here. What happens if your sandwich bag is picked up by the wind while you're eating lunch outside on a picnic table? You wind yourself running around the park after your lunch bag. Your air fryer experiences the exact same thing. The light material is blown around by the "air". You are left with, at most, a quesadilla without a top. The worst case scenario is a batch of burnt kale chips. Fortunately, there is an easy fix for this. Users of air fryers are advised by Ninja to use toothpicks to hold the light ingredients in place. However, if the issue is kale chips, this doesn't really help. Food bloggers frequently advise covering the chips with a rack to keep them in place as a solution to that issue.