FULL PRODUCT VERSION :
JRE 8 u92

ADDITIONAL OS VERSION INFORMATION :
Windows 8.1 Enterprise

EXTRA RELEVANT SYSTEM CONFIGURATION :
On Windows Surface 3 Tablet

A DESCRIPTION OF THE PROBLEM :
On a Windows Surface 3 Tablet, sometimes when selecting a ComboBox by Touch the popup does not appear (the code is the JavaFX Demo for Combos). The Popup always appear when using the Mouse, and when using a basic Swing example with a Combo and selecting the JComboBox by Touch the Swing popup always appear.

Note that the Mouse Release event is always detected, but in some cases the show() method for the Popup is not called or has no effect.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Use the JavaFX Demo with the Combo example, try to select the Combo by touch, approximately once in 10 times the popup does not appear (on Windows Surface 3)

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The Popup should always appear
ACTUAL -
approximately once in 10 times the popup does not appear

REPRODUCIBILITY :
This bug can be reproduced often.

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Use the Ensemble Demo for the ComboBox, or any JavaFX ComboBox
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