Hello,
Until this feature gets approved and implemented, you may consider using the following workaround: https://blazorrepl.telerik.com/wfkBajvP42TB9xRa50
It relies on the ContextMenu OnItemRender event. In its handler a js function is called, in which a click handler is attached to parent items and the click event is then prevented.
Regards,
Ivan Danchev
Progress Telerik
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