On the left is the Yamazen hanger rack I am using now, and on the right is the hanger rack I used before. Both look similar at a glance.
The parts that support the vertical poles are different. The one on the right is fixed by applying screws directly to the pole. Therefore, in addition to distorting the pole as shown in the photo, it cannot bear the weight and gradually lowers.
So here is what we have replaced it with. It is secured using the entire plastic surrounding the pole. Since I replaced it with the Yamazen hanger rack, the pole no longer drops at all.
The parts that support the poles together can easily come off, so it is best to secure them with vinyl tape or similar.
I hope the above is helpful.