"Reset" on people page doesn't re-add profile image

If you "Clear" the profile image on /admin/me/profile, and try hitting reset, it doesn't re-add the image, like you'd expect it to.

I can try fixing this today, I'm just busy preparing for an interview so I will see if I get the chance later.

I'm realizing now I'm not sure what the reset button even does... functionally it doesn't seem to do anything