In the Hover, the thresholds are often broken, especially in winter under the weight of the intention of snow. You can't pull it off because they're holding on to the clips. The clipps will need to be replaced with bolts with washers.
You need to put a bolt in the hole inside the wing by opening the door. You should bolt the puck and tighten the bolt. In the middle of the threshold, you can simply replace it with a more solid, for example, a "check" from Ford. After these developments, the thresholds can be forgotten: they will be fixed very well.