User has to refocus on the element to see tooltip being updated after having called updateContent().
Some form has a button with a tooltip "First"
User hovers a mouse over the button and a tooltip appears on the screen with a text "First"
With a timer set the tooltip changes its content to be "Second" using updateContent() function
Tooltip continue to show "First" as a current tooltip
User removes mouse from the button (removes the focus)
User hovers a mouse cursor over the button and tooltip appears on the screen with a text "Second"