svg animateMotion动画本身的bug，该怎么解决？

svg animateMotion做路径动画时，如果给动画元素初始的x,y坐标，这个元素就不会按照给定路径做运动，看下图说明：

react代码如下：

 const getPathLen = (d) => {
  try {
    const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
    path.setAttribute('d', d);
    const pathLen = path?.getTotalLength();
    const point = path?.getPointAtLength(pathLen / 2);
    return { point, pathLen };
  } catch (e) {
    return { point: null };
  }
};

const ModalChart = () => {
  const data = [
    {
      path: 'M0,0 C100,15 200,200 600,20',
      dur: 4,
      begin: 1,
      pathId:' id-a',
      text: '1',
      stroke: 'red',
      strokeWidth: 1,
      x:0,
      y:0
    },
    {
      path: 'M600,20 C700,600 800,700 800,40',
      dur: 5,
      begin: 5,
      pathId: ' id-b',
      text: '2',
      stroke: 'yellow',
      strokeWidth: 1,
      x:600,
      y:20
    },
    {
      path: 'M800,40 Q400,400 250,300',
      dur: 5,
      begin: 10,
      pathId:' id-c',
      text: '3',
      stroke: 'skyblue',
      strokeWidth: 1,
      x:800,
      y:40
    },
  ];

  return (
    <div>
      <svg width="100%" height="100%" >
        {data.map((item, index) => {
          const len = getPathLen(item.path)?.pathLen;
          return (
            <g key={index}>
              <path
                d={item.path}
                id={item.pathId}
                stroke="black"
                strokeWidth={item.strokeWidth}
                fill="none"
              />
              <text  fontSize={30}>
                {item.text}
                <animateMotion begin={`${item.begin}s`} dur={`${item.dur}s`}  className={'aaa'}>
                  <mpath href={`#${item.pathId}`} />
                </animateMotion>
              </text>
              <path
                d={item.path}
                stroke={item.stroke}
                strokeWidth={3}
                fill="none"
                strokeDashoffset={len}
                strokeDasharray={`${len},${len}`}
              >
                <animate
                  attributeName="stroke-dashoffset"
                  values={`${len};0`}
                  begin={`${item.begin}s`}
                  dur={`${item.dur}s`}
                  repeatCount="1"
                />
              </path>
            </g>
          );
        })}
      </svg>
    </div>
  );
};
export default ModalChart;

有没有人能够解答下？

给了初始坐标，看看运动后2的坐标

这个初值需要符合一定条件的，条件不符合导致出现偏移