Unable to authenticate with Mojang

I use tcp shield, and sometimes such a message is issued (I also have a license, and I don't have such problems, and socialadoon is enabled /premium on my account).

```
[limboauth]: Unable to authenticate with Mojang.
java.io.IOException: /IP:56963: GOAWAY received
at jdk.internal.net.http.HttpClientImpl.send(HttpClientImpl.java:586) ~[java.net.http:?]
at jdk.internal.net.http.HttpClientFacade.send(HttpClientFacade.java:123) ~[java.net.http:?]
at net.elytrium.limboauth.LimboAuth.isPremiumExternal(LimboAuth.java:685) ~[?:?]
at net.elytrium.limboauth.LimboAuth.checkIsPremiumAndCache(LimboAuth.java:778) ~[?:?]
at net.elytrium.limboauth.LimboAuth.isPremium(LimboAuth.java:840) ~[?:?]
at net.elytrium.limboauth.listener.AuthListener.onPreLoginEvent(AuthListener.java:68) ~[?:?]
at net.elytrium.limboauth.listener.Lmbda$49.execute(Unknown Source) ~[?:?]
at com.velocitypowered.proxy.event.UntargetedEventHandler$VoidHandler.lambda$buildHandler$0(UntargetedEventHandler.java:56) ~[velocity.jar:3.2.0-SNAPSHOT (git-8dcc7ee3-b294)]
at com.velocitypowered.proxy.event.VelocityEventManager.fire(VelocityEventManager.java:597) ~[velocity.jar:3.2.0-SNAPSHOT (git-8dcc7ee3-b294)]
at com.velocitypowered.proxy.event.VelocityEventManager.lambda$fire$5(VelocityEventManager.java:478) ~[velocity.jar:3.2.0-SNAPSHOT (git-8dcc7ee3-b294)]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[?:?]
at java.lang.Thread.run(Thread.java:833) [?:?]
Caused by: java.io.IOException: /IP:56963: GOAWAY received
at jdk.internal.net.http.Http2Connection.handleGoAway(Http2Connection.java:1008) ~[java.net.http:?]
at jdk.internal.net.http.Http2Connection.handleConnectionFrame(Http2Connection.java:873) ~[java.net.http:?]
at jdk.internal.net.http.Http2Connection.processFrame(Http2Connection.java:748) ~[java.net.http:?]
at jdk.internal.net.http.frame.FramesDecoder.decode(FramesDecoder.java:155) ~[java.net.http:?]
at jdk.internal.net.http.Http2Connection$FramesController.processReceivedData(Http2Connection.java:232) ~[java.net.http:?]
at jdk.internal.net.http.Http2Connection.asyncReceive(Http2Connection.java:674) ~[java.net.http:?]
at jdk.internal.net.http.Http2Connection$Http2TubeSubscriber.processQueue(Http2Connection.java:1310) ~[java.net.http:?]
at jdk.internal.net.http.common.SequentialScheduler$LockingRestartableTask.run(SequentialScheduler.java:205) ~[java.net.http:?]
at jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run(SequentialScheduler.java:149) ~[java.net.http:?]
at jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run(SequentialScheduler.java:230) ~[java.net.http:?]
at jdk.internal.net.http.common.SequentialScheduler.runOrSchedule(SequentialScheduler.java:303) ~[java.net.http:?]
at jdk.internal.net.http.common.SequentialScheduler.runOrSchedule(SequentialScheduler.java:256) ~[java.net.http:?]
at jdk.internal.net.http.Http2Connection$Http2TubeSubscriber.runOrSchedule(Http2Connection.java:1328) ~[java.net.http:?]
at jdk.internal.net.http.Http2Connection$Http2TubeSubscriber.onNext(Http2Connection.java:1354) ~[java.net.http:?]
at jdk.internal.net.http.Http2Connection$Http2TubeSubscriber.onNext(Http2Connection.java:1288) ~[java.net.http:?]
at jdk.internal.net.http.common.SSLTube$DelegateWrapper.onNext(SSLTube.java:210) ~[java.net.http:?]
at jdk.internal.net.http.common.SSLTube$SSLSubscriberWrapper.onNext(SSLTube.java:492) ~[java.net.http:?]
at jdk.internal.net.http.common.SSLTube$SSLSubscriberWrapper.onNext(SSLTube.java:295) ~[java.net.http:?]
at jdk.internal.net.http.common.SubscriberWrapper$DownstreamPusher.run1(SubscriberWrapper.java:316) ~[java.net.http:?]
at jdk.internal.net.http.common.SubscriberWrapper$DownstreamPusher.run(SubscriberWrapper.java:259) ~[java.net.http:?]
at jdk.internal.net.http.common.SequentialScheduler$LockingRestartableTask.run(SequentialScheduler.java:205) ~[java.net.http:?]
at jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run(SequentialScheduler.java:149) ~[java.net.http:?]
at jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run(SequentialScheduler.java:230) ~[java.net.http:?]
at jdk.internal.net.http.common.SequentialScheduler.runOrSchedule(SequentialScheduler.java:303) ~[java.net.http:?]
at jdk.internal.net.http.common.SequentialScheduler.runOrSchedule(SequentialScheduler.java:256) ~[java.net.http:?]
at jdk.internal.net.http.common.SubscriberWrapper.outgoing(SubscriberWrapper.java:232) ~[java.net.http:?]
at jdk.internal.net.http.common.SubscriberWrapper.outgoing(SubscriberWrapper.java:198) ~[java.net.http:?]
at jdk.internal.net.http.common.SSLFlowDelegate$Reader.processData(SSLFlowDelegate.java:444) ~[java.net.http:?]
at jdk.internal.net.http.common.SSLFlowDelegate$Reader$ReaderDownstreamPusher.run(SSLFlowDelegate.java:268) ~[java.net.http:?]
at jdk.internal.net.http.common.SequentialScheduler$LockingRestartableTask.run(SequentialScheduler.java:205) ~[java.net.http:?]
at jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run(SequentialScheduler.java:149) ~[java.net.http:?]
at jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run(SequentialScheduler.java:230) ~[java.net.http:?]
... 3 more
```

Start at LimboAuth.isPremiumExternal around line 685, then trace checkIsPremiumAndCache and AuthListener.onPreLoginEvent using the supplied stack trace. Try to reproduce the intermittent failure with TCP Shield and record the conditions around the HTTP/2 GOAWAY response. Done should include a confirmed cause and a verified authentication outcome, but the issue does not define the expected remediation.

Written by the indexing model from the issue text.