Steps to reproduce (Windows client):

• Configure at least one session in x2goclient
• In the general configuration menu, check ALL the boxes related to minimizing the application to a Notification Area icon
• Click on the session card, do NOT enter a password, do NOT click OK
• Instead, click the "minimize" icon
• X2Go icon appears in Notification Area AND in taskbar
• Clicking on the X2Go entry in the taskbar returns a broken window (frame with "screencapture" of previous screen content)

-Stefan