Canvas just submitted one of my peer’s assignments as my own?

Has this happened to anyone else? I noticed on my canvas that one of my assignments was turned in an hour ago. Only I know I didn’t submit it because I’m not done with the assignment yet.

I looked at the uploaded file and its a paper by a random girl in my class. We have never talked or shared documents before. The only hint is that we have similar first names and canvas got confused? This is such a weird situation. I already emailed my instructor letting her know, but I am so baffled at how this could happen.