postMessage数据有时会丢失

如何解决postMessage数据有时会丢失

我正在尝试为我的PWA设置网络共享目标，我可以在其中将其他应用程序的文件共享到我的PWA，它对小文件可以正常工作，但是当文件大小超过1 MB时，来自服务人员的数据，其中截取到应用程序的POST请求，并在event.data中返回null，我不确定是什么原因造成的，并且我不知道这仅仅是时间问题还是我需要改变我做事的方式。这是所有相关代码：

sw.js

self.addEventListener('fetch',function (event) {
    if (event.request.method === 'POST' && event.request.url.includes('/me/upload/')) {
        event.respondWith((async () => {
            const formData = await event.request.formData();
            const file = formData.get('file');
            function recieveReadyMessage(event) {
                if (event.data.action === 'receive-share-file') {
                    event.source.postMessage({file,action: 'load-image'});
                    self.removeEventListener('message',recieveReadyMessage);
                }
            }
            self.addEventListener('message',recieveReadyMessage);
            return Response.redirect('/me/upload/',303);
        })());
    } //...
});

index.html

function recieveMessage(event) {
    if(event.data === null || event.data.file === null) {
        help("It appears something went wrong when receiving the file,this normally happens with large files,if this issue continues,please contact Alek.");
        return;
    }
    if(event.data.action === 'load-image') {
        let fileSelector = document.getElementById('uploadlbl');
        files[0] = event.data.file;
        if (files) {
            fileSelector.innerText = files[0].name;
        } else {
            fileSelector.innerText = 'Your file here';
        }
    }
}
navigator.serviceWorker.addEventListener('message',recieveMessage,false);
navigator.serviceWorker.ready.then(registration => {
    registration.active.postMessage({action: 'receive-share-file'});
});

manifest.json共享目标

"share_target": {
  "action": "/me/upload/","method":"POST","enctype": "multipart/form-data","params": {
    "files": [
      {
        "name":"file","accept": ["*/*",".*"]
      }
    ]
  }
}