After updating to v4.9.1, downloading files from Alibaba Cloud OSS fails with a signature error when the user's group has a download speed limit configured. Initiating a download in this case causes OSS to return a signature/authorization exception.

Steps to reproduce:

1. Upgrade to 4.9.1.
2. Ensure the user belongs to a group that has a download throttling / speed-limit setting.
3. Attempt to download a file from Alibaba Cloud OSS.

Expected behavior:

• The file download proceeds normally and OSS accepts the request with a valid signature.

Actual behavior:

• OSS returns a signature/authorization error (signature exception) and the download fails.

<Code>SignatureDoesNotMatch</Code>
<Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message>