Testsuite name:AWT
Test name(s):AWT_Menu/Automated/MenuShortcutTest
Product(s) tested:ORACLE JDK12 b28(64bit)
Test tool: tonga-4.0.2-rc2.jar
OS/architecture:mac10.14-x64

Actual behavior:
1.The test failed automatically. The details refer to MenuShortcutTest.log
2.On Mac10.13 x64 with JDK12b28(64bit):Failed as the same issue.Refer to log MenuShortcutTest-mac10.13.log

The detail log:
KeyEvent:2: keyPressed: java.awt.Button[button0,33,28,85x29,label=Button]
[2019-01-18T08:19:05.92] ItemEvent: itemStateChanged: java.awt.CheckboxMenuItem[chkmenuitem0,label=CheckboxMenuItem1:5:12:0,shortcut=⌘+X,state=true]
[2019-01-18T08:19:05.92] ItemEvent: itemStateChanged: java.awt.CheckboxMenuItem[chkmenuitem0,label=CheckboxMenuItem1:5:12:0,shortcut=⌘+X,state=true]
[2019-01-18T08:19:05.96] KeyEvent:3: keyReleased: java.awt.Button[button0,33,28,85x29,label=Button]
[2019-01-18T08:19:06.01] KeyEvent:4: keyReleased: java.awt.Button[button0,33,28,85x29,label=Button]
[2019-01-18T08:19:11.52] FAILURE: More than expected events generated when cmd + X is pressed. Expected: 1, Actual: 2
[2019-01-18T08:19:11.52] Events generated are:
[2019-01-18T08:19:11.52] java.awt.event.ItemEvent[ITEM_STATE_CHANGED,item=CheckboxMenuItem1:5:12:0,stateChange=SELECTED] on chkmenuitem0
[2019-01-18T08:19:11.53] java.awt.event.ItemEvent[ITEM_STATE_CHANGED,item=CheckboxMenuItem1:5:12:0,stateChange=SELECTED] on chkmenuitem0
[2019-01-18T08:19:11.53] KeyEvent:5: keyPressed: java.awt.Button[button0,33,28,85x29,label=Button]
[2019-01-18T08:19:11.59] KeyEvent:6: keyPressed: java.awt.Button[button0,33,28,85x29,label=Button]
[2019-01-18T08:19:11.64] KeyEvent:7: keyReleased: java.awt.Button[button0,33,28,85x29,label=Button]
[2019-01-18T08:19:11.69] KeyEvent:8: keyReleased: java.awt.Button[button0,33,28,85x29,label=Button]
[2019-01-18T08:19:14.20] KeyEvent:9: keyPressed: java.awt.Button[button0,33,28,85x29,label=Button]
[2019-01-18T08:19:14.25] KeyEvent:10: keyPressed: java.awt.Button[button0,33,28,85x29,label=Button]
[2019-01-18T08:19:14.25] ItemEvent: itemStateChanged: java.awt.CheckboxMenuItem[chkmenuitem1,label=CheckboxMenuItem1:1,shortcut=⌘+B,state=true]
[2019-01-18T08:19:14.25] ItemEvent: itemStateChanged: java.awt.CheckboxMenuItem[chkmenuitem1,label=CheckboxMenuItem1:1,shortcut=⌘+B,state=true]
[2019-01-18T08:19:14.31] KeyEvent:11: keyReleased: java.awt.Button[button0,33,28,85x29,label=Button]
[2019-01-18T08:19:14.36] KeyEvent:12: keyReleased: java.awt.Button[button0,33,28,85x29,label=Button]
[2019-01-18T08:19:19.86] FAILURE: More than expected events generated when cmd + B is pressed. Expected: 1, Actual: 2