Hi NotHappyRN, welcome to the forum 
I am not sure how Avast revealed your location ..
But you can add any app you use to Do Not Disturb Mode :
- Avast > Performance > Do Not Disturb Mode > Add App
Greetz, Red.
It is a popup that states something like "your privacy is compromised, and your location (city) can be seen by hackers".
One presumes this is some sort of protection premium offers, to obscure that data. But I know it's a rake of my actual data, because my IP routes through a much bigger city and if it were reading my IP, that other city would have come up instead.
I could not take a screenshot in the moment as I was in the middle of a stream, and immediately panicked, trying to close it.
Thank you for the tip. Still... that's not okay for anyone using streaming software. It should check.