Google Find my phone notification - who found my phone?

I just got a notification on my Android phone that my phone has been found using the "Find my phone" function - but I didn't ask Google to find my phone. I've been looking in vain for a log of which IP addresses used that function, but I can't find it.

Suggestions? I've recently changed my Google password to a *very* high-entropy string.

find my google phone privacy