The log is extrmeely nosiey so it is hard to tell what the actual failure is but seems to be:

[23:07:53.279] test H3MultipleConnectionsToSameHost.test(): failure [154856ms]
java.util.concurrent.CompletionException: java.io.IOException: client connection idle timed out (90000 milli seconds) on quic:10
at java.base/java.util.concurrent.CompletableFuture.wrapInCompletionException(CompletableFuture.java:323)
at java.base/java.util.concurrent.CompletableFuture.encodeRelay(CompletableFuture.java:412)
at java.base/java.util.concurrent.CompletableFuture.completeRelay(CompletableFuture.java:421)
at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1173)
at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:531)
at java.base/java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:2221)
at java.net.http/jdk.internal.net.http.Http3ExchangeImpl.cancelImpl(Http3ExchangeImpl.java:732)
at java.net.http/jdk.internal.net.http.Http3Connection.lambda$close$1(Http3Connection.java:676)
at java.base/java.util.concurrent.ConcurrentHashMap$ValuesView.forEach(ConcurrentHashMap.java:4811)
at java.net.http/jdk.internal.net.http.Http3Connection.close(Http3Connection.java:676)
at java.net.http/jdk.internal.net.http.Http3Connection.close(Http3Connection.java:646)
at java.net.http/jdk.internal.net.http.Http3Connection.controlStreamFailed(Http3Connection.java:1184)
at java.net.http/jdk.internal.net.http.http3.streams.UniStreamPair.peerReaderLoop(UniStreamPair.java:432)
at java.net.http/jdk.internal.net.http.common.SequentialScheduler$LockingRestartableTask.run(SequentialScheduler.java:182)
at java.net.http/jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run(SequentialScheduler.java:149)
at java.net.http/jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run(SequentialScheduler.java:207)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1090)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:614)
at java.base/java.lang.Thread.run(Thread.java:1516)
Caused by: java.io.IOException: client connection idle timed out (90000 milli seconds) on quic:10
at java.net.http/jdk.internal.net.http.quic.TerminationCause.toReportedCause(TerminationCause.java:129)
at java.net.http/jdk.internal.net.http.quic.TerminationCause.<init>(TerminationCause.java:56)
at java.net.http/jdk.internal.net.http.quic.TerminationCause$SilentTermination.<init>(TerminationCause.java:203)
at java.net.http/jdk.internal.net.http.quic.TerminationCause.forSilentTermination(TerminationCause.java:96)
at java.net.http/jdk.internal.net.http.quic.IdleTimeoutManager.idleTimedOut(IdleTimeoutManager.java:435)
at java.net.http/jdk.internal.net.http.quic.IdleTimeoutManager$IdleTimeoutEvent.terminateNow(IdleTimeoutManager.java:539)
at java.net.http/jdk.internal.net.http.quic.IdleTimeoutManager$IdleTimeoutEvent.handle(IdleTimeoutManager.java:513)
at java.net.http/jdk.internal.net.http.quic.QuicTimerQueue.processDue(QuicTimerQueue.java:298)
... 6 more