I tried to test location based question on local environment, but it didn't work.
So I give it a try here.
I applogize for any inconvevience.
Have you tried this with the latest version 1.28.5? Indeed, there was a parameter bug in previous versions.
The symptom is same. I can't filter the questions by my locaion(near me). I assume that the reason is my location is saved in another language than English.
my answer is here