I just installed and fell in love with tixati.  Bug found when trying to close binary to systray in kde 5 plasma for kubuntu 15.10.  Binary continues to function, however you lose ability to bring it back to desktop.  It has to be manually ended and then restarted to regain control.
Lonnie

Kubuntu 19.10 problem still exists.

Mitigation is close button to minimize to tray. Do not right click trayicon but left click and it will show tixati again.

If you used minimize the only option still is terminate from task manager and restart executable.