Bug report

When the Editor is used in ExpansionPanel and an image is dragged in the Editor an error is thrown, The issue is reproducible after the ExpansionPanel is collapsed and then expanded.

Reproduction of the problem

1. Open the Dojo example
2. Collapse the ExpansionPanel
3. Expand the ExpansionPanel
4. Drag and drop an image into the inline editor

Current behavior

The image is displayed in a new tab and the following error appears: Cannot read property 'nodeType' of null

Expected/desired behavior

The image should be rendered in the Editor without errors in the console even after collapsing/expanding the ExpasnionPanel

Environment

• Kendo UI version: 2021.2.616

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