Wicket version is 8.12.0 wicket-bootstrap version is 2.0.15 Until now i am reluctant of trying a higher bootstrap version, since this means a migration from Bootstrap 3.x to 4.x (flex model) and editing all my html as well. So i first have to develop a small test prototype with higher versions only for TooltipBehavior.
Thank you for your help Christos Stieglitz
