The sliding area sometimes moves suddenly and quickly

[hestrro]

Now I zoom in on the sliding area and slide it to the buttomright corner of the sliding area. When I click the mouse and slide it a short distance, sometimes the sliding area will go directly to the topleft corner.
buttomright：

topleft：

[hestrro]

My QskScrollarea doesn't change its mouse events
#include "scrollview.h"
ScrollView::ScrollView(QQuickItem *parent):QskScrollArea(parent)
{
setFlickRecognizerTimeout(2);
setItemResizable(true);
setClip(true);//剪切区域,超出区域不显示
setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
}

void ScrollView::setViewSize(qreal width, qreal height)
{
scrollableWidth=width;
scrollableHeight=height;

}

void ScrollView::setCurrentSize(qreal size)
{
auto newwidth=scrollableWidthsize;
auto newheight=scrollableHeightsize;
setScrollableSize(QSizeF(newwidth,newheight));

}

[hestrro]

You can test this case by swiping to the lower right corner and then swiping several times in small increments. Sometimes it will jump directly to the upper left corner.