This issue happens dye to the feature provided in the RadEditor and allows users to resize images and tables in the content area. The feature is designed to initialize a complex logic of resizable div elements in the content that upon event handlers attached to the resize handles DOM resize event triggers a logic to change dynamically the size of the selected table or image element.
Due to its complexity, when multitude of tables are nested, the initialization process causes a performance issue and it appears that there are scenarios where Chrome cannot handle to render the elements and freezes.
This matter is logged and will be further investigated by the dev team, although due to its complex matter I am unable to provide a firm estimation when exactly it is going to be properly resolved.
Do not hesitate contacting me again in case you need further information on this matter.
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