raspberry pi 7" screen automatically double clicking after single touch - raspbian

I'm using Raspian-Jessie (RaspberryPi 3 with official touch 7" screen) and for some reason when I do a single tap on the screen, it does a double click on the screen making it useless for applications using e.g. Kivy.
Is there a setting I need to change to make the touch just do one click? Or is this a bug?
Thanks in advance.

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How did you test it in simulator? Simply pressing the mouse button for a long time is not the way. You have to go to the Menu item: Hardware->Force Touch Pressure, and change it to "Deep Press" From that moment on, your mouse taps will all be long presses. You have to change it back to "Shallow Press" in order for your normal mouse behavior to simulate regular tapping. Note there are also keyboard equivalents: shift-command 1 and shift-command 2.

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In small screen the scroll bar appears and the java button is below the screen, but in big screen its appeared without scrolling so its working fine with the big screen.
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Addins selected are ActiveX,Java,Web
Advanced thanks...
As per the given information I assume that the problem is with the object properties of the java button. Could you try adding only htmlid/name property & try highlighting the object in both the screens? Please disable object identification, location & indexing if applicable. If possible share the properties of the object for further analysis.
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Question 1)
I guess you are using Sencha native packaging, and you have encountered this bug: http://www.sencha.com/forum/showthread.php?259817-3.1.0.256-Strange-Android-Titlebar-on-native-Apps/page2
Quote from richardvd user of Sencha Touch Forums:
This is the Android TitleBar, you can remove it by adding an attribute
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