My mannequin was imported using FBX skeletal mesh, and the clothes and pants were imported using ABC. The animations are all 0-39 frame loop walking animations. When running for 10 minutes, the pants will go inside the legs, and then again after about 20 minutes, it will go even further in. Between 0-10 minutes, it’s normal, and between 10-20 minutes, it will gradually return to normal without penetrating the model. At around 20 minutes, both will penetrate the model again, and the penetration time is about 1-2 minutes. What is the reason for this.