The Textfield can't be shown after clicking "Show Textfield" button.

Testsuite name:JCK manual
Test name:api/java_awt/interactive/event/EventTests.html#EventTest0006
Product tested: JDK 9b66 64bit
OS/architecture:Solaris11.2-x64
 
Error log file:http://aurora-ds3.us.oracle.com:9502/runs/00929/929337.ManualSubmit/929337.ManualSubmit-1/workDir/api/java_awt/interactive/event/EventTests_EventTest0006.jtr

Reproducible: Always
Reproducible on machine: Evergreen-machine

Is it a Regression:Yes
[If Regression] Regression introduced in release/build: JDK9b65(64bit) (it's passed with the JDK9b64 under same config)
Test result on the last GAed release for this train:
[if Fail] Test result on FCS:

Is it a platform specific issue:Yes(same build on oel7.1-x64 Failed,
                                                 same build on oel7.0-x64 Failed,
                                                 same build on solaris11-sparc Failed,
                                                 same build on win7-sp1-x64 Passed,
                                                 same build(32bit) on win8.1-x86 Passed,
same build on mac10.10-x64 Passed)

Is it a new (previously unsupported) OS/browser/mode testing:No
[If new configuration testing] Issue specific to execution mode or OS/browser version:

Steps to reproduce:
1. Install test bundle jdk9b66 from http://jre.us.oracle.com/java/re/jdk/9/promoted/ea/b66/bundles/solaris-x64/jdk-9-ea-solaris-x64.tar.gz to /export/home/egtc/workspace/jck
2. Download the JCK-runtime-9.jar from http://jre.us.oracle.com/java/re/jck/9/promoted/latest/bundles to /export/home/egtc/workspace/jck and use /export/home/egtc/workspace/jck/jdk1.9.0/bin/java -jar JCK-runtime-9.jar to unzip it
3.Run the following command:
/export/home/egtc/workspace/jck/jdk1.9.0/bin/java -showversion -server -d64 -Xmixed -Dswing.defaultlaf=com.sun.java.swing.plaf.motif.MotifLookAndFeel -cp /export/home/egtc/workspace/jck/JCK-runtime-9/classes:/export/home/egtc/workspace/jck/jdk1.9.0 -Djava.security.policy=/export/home/egtc/workspace/jck/JCK-runtime-9/lib/jck.policy javasoft.sqe.tests.api.java.awt.interactive.event.EventTests -TestCaseID EventTest0006

Descriptions:
This test verifies that events on a textfield are generated as expected.Please perform actions on the textfield on the textfield on the left to generate textfield events.Each event generated on the textfield will turn on the corresponding event checkbox shown below.All event checkboxes must be checked via events generated on the textfield for the test to pass.

Actual behavior:
1. After clicking the "Hide Textfield" button , but the Textfield can't be shown when clicking "Show Textfield" button refer to Event1.jpg and Event2.jpg.