多文件上传问题，无法同时多文件上传

[xiejibiao]

进行多文件上传时，小文件的情况下，是两个文件同时上传，但是，当如果是大文件的情况下， 只有一个文件在进行上传，我不知道是不是Cos线程设置的问题，如果是线程设置的问题，那我应该在哪里设置？
TransferTask transferTask = await transferManager.upload(
uploadEntity.bucketName ?? '',
'user${user.memberEquity.value?.id}/${uploadEntity.ossFileName ?? ''}',
filePath: uploadEntity.localPath ?? '',
uploadId: uploadEntity.uploadId ?? '',
trafficLimit: 8192000,
resultListener: ResultListener(
(header, result) => uploadSuccessCallBack(header, result, uploadEntity.taskId ?? ''),
(clientException, serviceException) => uploadFailCallBack(clientException, serviceException, uploadEntity.taskId ?? '')
),
stateCallback: (TransferState state) => uploadStateCallback(state, uploadEntity.taskId ?? ''),
progressCallBack: (complete, target) => uploadProgressCallBack(complete, target, uploadEntity.taskId ?? ''),
initMultipleUploadCallback: (String bucket, String cosKey, String uploadId) => initMultipleUploadCallback(uploadId, uploadEntity.taskId ?? ''),
);