Touch screen issue with DropEvent

I have my own project where i have implemented Drag and Drop. After migrating from Qt 5.8 to Qt 5.9 and above. I started facing issue in DropEvent. After testing with Qt own example i found this issue is from Qt itself.

I have an IPC (Industrial PC) with following configuration:

-Windows Edition = Windows Embedded Standard, Service Pack 1.

-System Manufacturer = Beckhoff Automation GmbH.

-Processor = Intel(R) Core(TM)2 Duo CPU T9400 @ 2.53GHz

-RAM = 2.93 GB

System type = 32 bit 

Visual Studio - Microsoft Visual Studio Express 2015 for Windows Desktop

When using Qt draganddrop example (Drag and Drop Robot Example) on my IPC, DragEnter and DragMove event works but DropEvent is not called after dropping(an unknown delay). It only works when i touch screen again.

The issue doesn't occur in Qt 5.8 but this issue can be reproduce in Qt 5.9.6, Qt5.10 and Qt 5.11.2

Thanks,

Maaz