Bug report

Dropping an image into the Editor's content results in the image being opened in the browser instead of being added to the widget's content. Reproducible in Chrome, IE and Edge. If there is existing content and the image is dropped in it, the image is added to the content as expected.

Regression introduced in 2019.2.619.
Related to #4994

Reproduction of the problem

Screencast.
Dojo example.

1. Drag an image into the Editor's content.

Current behavior

The image is opened in the browser.

Expected/desired behavior

The image is added to the Editor's content.

Environment

• Kendo UI version: 2019.3.1023
• jQuery version: x.y
• Browser: [Chrome 78, IE, Edge ]