Test error in I-Build org.eclipse.e4.ui.tests.workbench.PartRenderingEngineTests testBut336225()

[vogella]

https://download.eclipse.org/eclipse/downloads/drops4/I20260602-1800/testresults/html/org.eclipse.e4.ui.tests_ep441I-unit-macosx-x86_64-java21_macosx.cocoa.x86_64_21.html

org.eclipse.e4.ui.tests.workbench.PartRenderingEngineTests testBut336225()

	The shell should not have been disposed first ==> expected: <false> but was: <true>

org.opentest4j.AssertionFailedError: The shell should not have been disposed first ==> expected: <false> but was: <true>
at org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151)
at org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132)
at org.junit.jupiter.api.AssertFalse.failNotFalse(AssertFalse.java:63)
at org.junit.jupiter.api.AssertFalse.assertFalse(AssertFalse.java:36)
at org.junit.jupiter.api.Assertions.assertFalse(Assertions.java:239)
at org.eclipse.e4.ui.tests.workbench.PartRenderingEngineTests.testBut336225(PartRenderingEngineTests.java:1751)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)

Looks to me like this is caused by #2649

@HannesWell please have a look

[HannesWell]

Unfortunately I cannot reproduce the failure locally. For me the test passes. It prints a lot of error messages on the console, but that's the same when I revert the change you mentioned.
Can you reproduce it?