Steps to reproduce:
Create a post of a couple of paragraphs or more.
Return to edit the post, and include an image in the middle of it.
Expected behaviour: after the image has uploaded, the cursor should be at the end of the image, ready to continue the edit.
Actual behaviour: the cursor has jumped to the end of the post.
It happens whether the image is uploaded using the editor upload button, or drag-and-drop.