Timeouts downloading dsyms

I'm seeing request timeouts attempting to download any dsym for my application, including old versions for which I have successfully obtained dsyms in the past. (Details in radar 36305587).

Dsym downloads in the Xcode 9.2 Organizer fail with "The request timed out."

Console.app output from Xcode shows the underlying url:

IDEdSYMDownloader: Operation failed: (Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={_kCFStreamErrorCodeKey=-2102, NSURLSessionDownloadTaskResumeData=<CFData 0x7fc52045c380 [0x7fffad019980]>{length = 6799, capacity = 16384, bytes = 0x3c3f786d6c2076657273696f6e3d2231 ... 2f706c6973743e0a}, NSUnderlyingError=0x7fc5206ba320 {Error Domain=kCFErrorDomainCFNetwork Code=-1001 "(null)" UserInfo={_kCFStreamErrorCodeKey=-2102, _kCFStreamErrorDomainKey=4}}, NSLocalizedDescription=The request timed out., NSErrorFailingURLStringKey=http://iosapps.itunes.apple.com/apple-assets-us-std-000001/{REDACTED}, NSErrorFailingURLKey=http://iosapps.itunes.apple.com/apple-assets-us-std-000001/Purpl<…>

Attempts to curl that url show that it receives a HTTP 200 response and most of the advertied payload length before hanging and eventually having the connection reset.

curl -v http://iosapps.itunes.apple.com/apple-assets-us-std-000001/... > dsym_2.12.0
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0*   Trying 17.253.5.205...
* TCP_NODELAY set
* Connected to iosapps.itunes.apple.com (17.253.5.205) port 80 (#0)
> GET /apple-assets-us-std-000001/...} HTTP/1.1
> Host: iosapps.itunes.apple.com
> User-Agent: curl/7.54.0
> Accept: */
>
< HTTP/1.1 200 OK
...
< Date: Tue, 09 Jan 2018 18:19:20 GMT
< Last-Modified: Tue, 21 Nov 2017 21:56:01 GMT
...
< Cache-Control: private
...
< Accept-Ranges: bytes
< Content-Type: application/octet-stream
< Content-Length: 7081049
< Server: ATS/7.1.2
< Age: 139
< Via: https/1.1 ussjc2-vp-vst-012.ts.apple.com (ApacheTrafficServer/7.1.1), http/1.1 ussjc2-vp-vfe-002.ts.apple.com (ApacheTrafficServer/7.1.1), http/1.1 ussjc2-edge-lx-011.ts.apple.com (ApacheTrafficServer/7.1.2), http/1.1 ussjc2-edge-bx-019.ts.apple.com (ApacheTrafficServer/7.1.2)
...
< X-Cache: miss, hit-fresh, miss, miss
< Access-Control-Allow-Origin: *
< Connection: keep-alive
<
{ [4738 bytes data]
99 6915k   99 6913k    0     0   149k      0  0:00:46  0:00:46 --:--:--     0* Recv failure: Connection reset by peer
* stopped the pause stream!
99 6915k   99 6913k    0     0  39848      0  0:02:57  0:02:57 --:--:--     0
* Closing connection 0
curl: (56) Recv failure: Connection reset by peer

Failures are consistent for every app, version of an app, and requesting user in the organization I've been able to try so far.

I'm assuming dsyms aren't broken for everyone or there would be more noise about it? Apple Developer Program Support tried to send me off to Developer Technical Support but this doesn't seem like an apporpriate issue for a TSI request and my radar ticket hasn't seen a response. Anyone from Apple available to figure out what's happened to this organization's dsym assets?