Hello Bahman,
The described behavior under Chrome is a result of an implemented feature in the paste functionality of the Editor. This feature preserves the data of the picture, additionally this is caused before the
OnClientPasteHtml event and this is why this image is not being strip by the custom logic.
This feature can be disabled with some additional JavaScript code, which overrides the built-in function and returns false to stop the logic. Please follow the further modified customization:
Regards,
Ianko
Telerik
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