Hi Jad,
One more approach is to add conditional CSS style class to the Tooltip ExtendedClass property based on the content availablity.

Also define the below-mentioned CSS definition in the stylesheet section.
CSS rule:
.hide-tooltip.osui-tooltip.osui-tooltip--is-hover:hover .osui-tooltip__balloon-wrapper {
display: none;
}
Demo screen: TooltipTask
Note: Please post your comments in english lanaguage (or use google translate) for other community members to understand and help you better :)
Refer to the attached oml
I hope this helps you!
Kind regards,
Benjith Sam