You should narrow down filter expression for the ToolTip - the jQuery selector which narrows the elements within the container for which the Tooltip will be shown. The easiest way to do so is to open your browser dev tools and start narrowing down the selection using #Menu as a beginning. You may try the following selector, which returns only child items on my side: '#Menu .k-item .k-group .k-item'
You may test it in the browser with jQuery as follows: $('#Menu .k-item .k-group .k-item') . Executing it should return child items only.
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