touchscreen does not work in menus

Good morning, i got some problems using my Fujitsu T730. General the touchscreen is working, but when i open a menu i can not click anything; mouse clicks are also not working. To get everything back working i need to press Esc. Sounds to my like a Bug? I think its more QT related, or? I was not only trying TDE 3.5.13.1, i also tried Slaveks upcoming 3.5.13.2 Release and the Nightly Snapshots of TDE R14. Kind Regards, Richard Lamboj