I examined the page's source and I found out that you are using the Resize
animation in combination with Sticky=true
and this causes the problem.
When you have set the Sticky property to true you configure the RadToolTip to hide when you move the mouse on it and then move it out of it. The resizing animation, which you have set changes the size and the position of the tooltip and starts from the left top corner of the target element. This being said when the animation starts the mouse is on the tooltip at certain moment and after that it gets out of it and because of the Sticky property the tooltip has to hide.
This is logged in our database for fixing and at this point the workaround is to set manual close only in the time between the OnClientBeforeShow
events. Another option is to remove one of the discussed settings.
the Telerik team