Worker return 1101

Since 29 September my worker start return 1101 error, worker used to upload files to R2 and looks like:

if (request.body === null) {
    return response400(requestContext.request, "Missing request body");
}
await bucket.put(fullPath, request.body);
return response(requestContext.request, null, { status: 201 });

if (request.body === null) {
    return response400(requestContext.request, "Missing request body");
}
await bucket.put(fullPath, request.body);
return response(requestContext.request, null, { status: 201 });

On uploading HTTP client use "Transfer-Encoding: chunked" header but worker returns:

TypeError: Provided readable stream must have a known length (request/response body or readable half of FixedLengthStream)

TypeError: Provided readable stream must have a known length (request/response body or readable half of FixedLengthStream)

What interesting that sometimes uploading works and worker return 201 as expected, something like in 10% of uploading requests is success.
Worker code is not modified before 29 September, here is example of logs with two tries, first failed, second success:

PUT https://domain.com/foobar?action=single-upload - Exception Thrown @ 10/1/2025, 9:46:59 PM
✘ [ERROR]   TypeError: Provided readable stream must have a known length (request/response body or readable half of FixedLengthStream)

PUT https://domain.com/foobar?action=single-upload - Ok @ 10/1/2025, 9:47:01 PM

PUT https://domain.com/foobar?action=single-upload - Exception Thrown @ 10/1/2025, 9:46:59 PM
✘ [ERROR]   TypeError: Provided readable stream must have a known length (request/response body or readable half of FixedLengthStream)

PUT https://domain.com/foobar?action=single-upload - Ok @ 10/1/2025, 9:47:01 PM

Any ideas what may be a reason?
Thanks.

Worker return 1101

Since 29 September my worker start return 1101 error, worker used to upload files to R2 and looks like:

if (request.body === null) {
    return response400(requestContext.request, "Missing request body");
}
await bucket.put(fullPath, request.body);
return response(requestContext.request, null, { status: 201 });

if (request.body === null) {
    return response400(requestContext.request, "Missing request body");
}
await bucket.put(fullPath, request.body);
return response(requestContext.request, null, { status: 201 });

On uploading HTTP client use "Transfer-Encoding: chunked" header but worker returns:

TypeError: Provided readable stream must have a known length (request/response body or readable half of FixedLengthStream)

TypeError: Provided readable stream must have a known length (request/response body or readable half of FixedLengthStream)

PUT https://domain.com/foobar?action=single-upload - Exception Thrown @ 10/1/2025, 9:46:59 PM
✘ [ERROR]   TypeError: Provided readable stream must have a known length (request/response body or readable half of FixedLengthStream)

PUT https://domain.com/foobar?action=single-upload - Ok @ 10/1/2025, 9:47:01 PM

PUT https://domain.com/foobar?action=single-upload - Exception Thrown @ 10/1/2025, 9:46:59 PM
✘ [ERROR]   TypeError: Provided readable stream must have a known length (request/response body or readable half of FixedLengthStream)

PUT https://domain.com/foobar?action=single-upload - Ok @ 10/1/2025, 9:47:01 PM

Any ideas what may be a reason?
Thanks.

Worker return 1101

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