Hi 
So, if you create a scroll box, add some children with tooltips to it, and hover your mouse pointer over one of them, the corresponding tooltip will appear as expected.
Now, if you keep the mouse pointer in the same position and scroll the scroll box up/down so that another child slides under the mouse pointer, the child’s tooltip will not appear unless you move the mouse pointer by 1 or more pixels. 
Are there any workarounds for this bug?
Thanks 