Synaptics touchpad blocked & delay when using the keyboard in Windows 8.1

Sometimes (possibly when I use the keyboard and then quickly attempt to move the mouse arrow on the screen with the Synaptics touchpad), I am unable to move the cursor for a half of second-or-so.
Sometimes I cannot tap to click, maybe, few seconds (it is very annoying).
There are some Mouse and touchpad settings in Windows 8.1 ("To prevent the cursor from accidentally moving while you type, change the delay before clicks work") which I set to "No Delay (always on)" but it does not work, either.
 I also checked the following registry key:
HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre​ntVersion\PrecisionTouchPad
but "AAPThreshold" is set correctly to 0 (No delay).
But I still experiences problems and touchpad does not work while typing and sometimes also few moments after.
Using HP Zbook 14, Win 8.1 x64, Synaptics driver 17.0.18.23.

Hi,
If you trying connect two Universal apps through Bluetooth, can you check if the
Windows 8.1 Bluetooth RFComm sample runs fine on both the devices? I successfully tested the Windows 8.1 Bluetooth RFComm sample on Laptop (Windows 8.1) and Windows Phone 8.1 (paired).
Make sure the service which you are trying to advertise/listen is supported by both the devices. 
-Sagar

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