Test "java/awt/Dialog/ModalDialogTest/ModalDialogTest.java" fails because new frame was not displayed when "New Frame" button was clicked

OS:
Windows

Environments:
Operating System: Windows 10 Pro 64-bit
Language: English (Regional Setting: English)
Processor: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz (4 CPUs), ~2.5GHz
Memory: 8 GB

Reproducible: Always

Failed on Release/Build: JDK 20 b27
Is it a Regression in JDK 20 release: No
[If Regression] Regression introduced in JDK 20 release/build: N/A
Test result on the last GAed release for this train: Failed on JDK 19 b33
Is it a platform-specific issue: NO. This issue happens on Windows. Not tested on macOS and Linux yet.

General description of the problem:
Test "java/awt/Dialog/ModalDialogTest/ModalDialogTest.java" fails on Windows 10 x64 because New frame was not displayed when "New Frame" button was clicked

Affected tests:
java/awt/Dialog/ModalDialogTest/ModalDialogTest.java

Steps to reproduce:
1. Run command: ksh /cygdrive/c/jtreg/bin/jtreg -testjdk:/cygdrive/c/jdk-20 -exclude:/cygdrive/c/reg/open/test/jdk/ProblemList.txt -verbose -gui -w resultsopen/JTwork -r resultsopen/report -manual /cygdrive/c/reg/open/test/jdk/:jdk_desktop
2. Run test case: java/awt/Dialog/ModalDialogTest/ModalDialogTest.java
3. Wait for the test to run completely

Expected behavior:
A new frame will display when the "New Frame" button is clicked

Actual behavior:
A new frame was not displayed when the "New Frame" button was clicked

Any non-default VM flags
-Dtest.vm.opts= \\
        -Dtest.tool.vm.opts= \\
        -Dtest.compiler.opts= \\
        -Dtest.java.opts= \\
        -Dtest.jdk='c:\\jdk-20' \\
        -Dcompile.jdk='c:\\jdk-20' \\
        -Dtest.timeout.factor=1.0 \\
        -Dtest.root='C:\\reg\\open\\test\\jdk' \\
        -Dtest.name=java/awt/Dialog/ModalDialogTest/ModalDialogTest.java \\
        -Dtest.file='C:\\reg\\open\\test\\jdk\\java\\awt\\Dialog\\ModalDialogTest\\ModalDialogTest.java' \\
        -Dtest.src='C:\\reg\\open\\test\\jdk\\java\\awt\\Dialog\\ModalDialogTest' \\
        -Dtest.src.path='C:\\reg\\open\\test\\jdk\\java\\awt\\Dialog\\ModalDialogTest;C:\\reg\\open\\test\\jdk\\java\\awt\\regtesthelpers' \\
        -Dtest.classes='C:\\cygwin64\\home\\trieunq\\resultsopen\\JTwork\\classes\\java\\awt\\Dialog\\ModalDialogTest\\ModalDialogTest.d' \\
        -Dtest.class.path='C:\\cygwin64\\home\\trieunq\\resultsopen\\JTwork\\classes\\java\\awt\\Dialog\\ModalDialogTest\\ModalDialogTest.d;C:\\cygwin64\\home\\trieunq\\resultsopen\\JTwork\\classes\\java\\awt\\regtesthelpers' \\
        -Dtest.modules=java.desktop \\
        --add-modules java.desktop \\
        com.sun.javatest.regtest.agent.MainWrapper 'C:\\cygwin64\\home\\trieunq\\resultsopen\\JTwork\\java\\awt\\Dialog\\ModalDialogTest\\ModalDialogTest.d\\main.0.jta'
result: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: Test failed! : Failure Reason: