Several tests in examples.wildfly.itests are failing due to "Exception during sync execution in UI thread"

Several tests in examples.wildfly.itests are failing due to "Exception during sync execution in UI thread"

Jenkins:

https://dev-platform-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/examples.wildfly.it.weekly/564/

Stack Trace:

org.eclipse.reddeer.common.exception.RedDeerException: Exception during sync execution in UI thread
at org.jboss.tools.examples.ui.bot.test.integration.WildFlyImportQuickstartsTest.quickstartTest(WildFlyImportQuickstartsTest.java:62)
Caused by: org.eclipse.swt.SWTException: Widget is disposed

Standard Error:

org.eclipse.reddeer.common.exception.RedDeerException: Exception during sync execution in UI thread
at org.eclipse.reddeer.common.util.Display.handleErrorOccured(Display.java:112)
at org.eclipse.reddeer.common.util.Display.syncExec(Display.java:84)
at org.eclipse.reddeer.core.handler.TreeItemHandler.getText(TreeItemHandler.java:68)
at org.eclipse.reddeer.swt.impl.tree.AbstractTreeItem.getCell(AbstractTreeItem.java:77)
at org.eclipse.reddeer.eclipse.ui.problems.Problem.getCell(Problem.java:68)
at org.eclipse.reddeer.eclipse.ui.markers.AbstractMarker.getDescription(AbstractMarker.java:43)
at org.jboss.tools.central.reddeer.api.ExamplesOperator.getAllWarnings(ExamplesOperator.java:225)
at org.jboss.tools.examples.ui.bot.test.integration.AbstractImportQuickstartsTest.checkForWarnings(AbstractImportQuickstartsTest.java:375)
at org.jboss.tools.examples.ui.bot.test.integration.AbstractImportQuickstartsTest.runQuickstarts(AbstractImportQuickstartsTest.java:283)
at org.jboss.tools.examples.ui.bot.test.integration.WildFlyImportQuickstartsTest.quickstartTest(WildFlyImportQuickstartsTest.java:62)
at jdk.internal.reflect.GeneratedMethodAccessor185.invoke(Unknown Source)
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:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)

...