Eraser deletes pasted image while erasing pen drawing

When I paste an image into Excalidraw and draw on it with the pen, using the eraser over the drawing also erases parts of the image.

The eraser should only remove the pen drawing and leave the pasted image untouched.

This is quite annoying when using Excalidraw to annotate screenshots/images. It would be great if images could be protected from the eraser.

Suggested improvement:

Consider making the eraser operate only on erasable drawing elements, or provide a way to lock/protect pasted images from the eraser.