SenderTestCase fails sporadically with ClosedConnectionException (Premature end of message body)

[INFO] Running io.undertow.server.handlers.SenderTestCase
    Error:  Tests run: 5, Failures: 0, Errors: 2, Skipped: 0, Time elapsed: 1.06 s <<< FAILURE! - in io.undertow.server.handlers.SenderTestCase
    Error:  testSyncTransfer[proxy][http2](io.undertow.server.handlers.SenderTestCase)  Time elapsed: 0.332 s  <<< ERROR!
    org.apache.http.ConnectionClosedException: Premature end of Content-Length delimited message body (expected: 6,706,000; received: 5,685,248)
    	at org.apache.http.impl.io.ContentLengthInputStream.read(ContentLengthInputStream.java:178)
    	at org.apache.http.conn.EofSensorInputStream.read(EofSensorInputStream.java:135)
    	at org.apache.http.conn.EofSensorInputStream.read(EofSensorInputStream.java:148)
    	at io.undertow.testutils.HttpClientUtils.readRawResponse(HttpClientUtils.java:81)
    	at io.undertow.testutils.HttpClientUtils.readRawResponse(HttpClientUtils.java:74)
    	at io.undertow.server.handlers.SenderTestCase.testSyncTransfer(SenderTestCase.java:232)
    	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
    	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
    	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    	at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
    	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
    	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
    	at io.undertow.testutils.DefaultServer.runChild(DefaultServer.java:651)
    	at io.undertow.testutils.DefaultServer.runChild(DefaultServer.java:144)
    	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
    	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
    	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
    	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
    	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
    	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    	at io.undertow.testutils.RunDefaultServer.evaluate(RunDefaultServer.java:74)
    	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
    	at io.undertow.testutils.DefaultServer.run(DefaultServer.java:375)
    	at org.junit.runners.Suite.runChild(Suite.java:128)
    	at org.junit.runners.Suite.runChild(Suite.java:27)
    	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
    	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
    	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
    	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
    	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
    	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
    	at org.apache.maven.surefire.junitcore.JUnitCore.run(JUnitCore.java:55)
    	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.createRequestAndRun(JUnitCoreWrapper.java:137)
    	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.executeEager(JUnitCoreWrapper.java:107)
    	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:83)
    	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:75)
    	at org.apache.maven.surefire.junitcore.JUnitCoreProvider.invoke(JUnitCoreProvider.java:158)
    	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:383)
    	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:344)
    	at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:125)
    	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:417)

    Error:  testAsyncTransfer[proxy][http2](io.undertow.server.handlers.SenderTestCase)  Time elapsed: 0.2 s  <<< ERROR!
    org.apache.http.ConnectionClosedException: Premature end of Content-Length delimited message body (expected: 6,706,000; received: 3,670,016)
    	at org.apache.http.impl.io.ContentLengthInputStream.read(ContentLengthInputStream.java:178)
    	at org.apache.http.conn.EofSensorInputStream.read(EofSensorInputStream.java:135)
    	at org.apache.http.conn.EofSensorInputStream.read(EofSensorInputStream.java:148)
    	at io.undertow.testutils.HttpClientUtils.readRawResponse(HttpClientUtils.java:81)
    	at io.undertow.testutils.HttpClientUtils.readRawResponse(HttpClientUtils.java:74)
    	at io.undertow.server.handlers.SenderTestCase.testAsyncTransfer(SenderTestCase.java:207)
    	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
    	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
    	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    	at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
    	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
    	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
    	at io.undertow.testutils.DefaultServer.runChild(DefaultServer.java:651)
    	at io.undertow.testutils.DefaultServer.runChild(DefaultServer.java:144)
    	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
    	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
    	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
    	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
    	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
    	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    	at io.undertow.testutils.RunDefaultServer.evaluate(RunDefaultServer.java:74)
    	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
    	at io.undertow.testutils.DefaultServer.run(DefaultServer.java:375)
    	at org.junit.runners.Suite.runChild(Suite.java:128)
    	at org.junit.runners.Suite.runChild(Suite.java:27)
    	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
    	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
    	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
    	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
    	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
    	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
    	at org.apache.maven.surefire.junitcore.JUnitCore.run(JUnitCore.java:55)
    	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.createRequestAndRun(JUnitCoreWrapper.java:137)
    	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.executeEager(JUnitCoreWrapper.java:107)
    	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:83)
    	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:75)
    	at org.apache.maven.surefire.junitcore.JUnitCoreProvider.invoke(JUnitCoreProvider.java:158)
    	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:383)
    	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:344)
    	at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:125)
    	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:417)