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
The image is opened in the browser.
The image is added to the Editor's content.