We see sometimes failures in bug4714674.java , they were seen on Windows and Linux since start of July 2024 .
Error is :

java.lang.RuntimeException: Failed: EDT was blocked
at bug4714674.test(bug4714674.java:84)
at bug4714674.main(bug4714674.java:46)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:588)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:1575)