Hi @harro thanks for your report and sorry to hear about your issues. I updated myself to the latest version and can confirm it is working for me both when all windows are minimised and when a program window is open. Accordingly, it would be helpful if you could kindly provide me with your full system specification including windows version number, etc.
Also, is there any change if you include a binding key to initiate mouse warp (within interaction settings)? Might also be an idea to completely uninstall the Tobii Software and reinstall just in case.
Thanks for your patience whilst we try to resolve your issues.