For me it was when I had location services disabled on my phone and Android _still_ popped up a notification about the commute time between my home and work, as I was walking out the door.
Not saying that’s what happened here, but with Google these days I’ll assume evil[2] instead of giving the benefit of the doubt.
[1]: https://www.theguardian.com/technology/2017/nov/22/google-tr...
[2]: http://doonesbury.washingtonpost.com/strip/archive/2014/06/0...