Problem with the tracker escaping

[ksh1983]

I am using ArcFace and SCRFD. When the face moves or under certain conditions, the bounding box randomly shrinks and grows, eventually disappearing off the screen. The face is not detected again until it reappears on the screen. This issue is more likely to occur when the face moves quickly or when there are two or more people in the webcam frame. Additionally, the smaller the bounding box and the further the detection distance, the more frequently this issue occurs. Can you help me understand why this is happening?