Doesn't it work it out based on the bluetooth interactions. And it takes distance and time spent into account. So you're only getting a real notification if you have been close enough to someone for long enough. Again it seems people moaning about things don't have a good grasp on how they actually work.

Why form such strong opinions without trying to understand something first?

I got a random notification a few weeks ago and when I clicked into the app nothing. So I googled it and it said it was a glitch based on how the app was interacting with the phone's software.

It's not ideal but surely anyone getting anything like this is going to double check before isolating.