@Max377
I have had a similar issue with my location. Although guests do not often specify anything about it in the review, they mark me down in that category.
I live in an urban, multi-cultural part of London. It's pretty typical of London neighbourhoods actually, but often guests come to the UK expecting us all to be stopping at 4pm for cream tea with the vicar (I am not joking). Some of them seem affronted when confronted with a non-white face. I know this misconception is common from travelling to many countries (including the US), where people tell me, "You can't be from London. You've got brown skin." Again, not joking.
I try to explain on my listing that I live in a multi-cultural, multi-income neighbourhood and that guests shouldn't book if they are uncomfortable with this. Still, many of them don't read any of it.
I had one guest a few months ago who was lovely and complimentary in every other way, but in her review, made my location sound like a ghetto. She mentioned 'dodgy types' of people and made it sound very unsafe. I have lived her for nearly ten years and never encountered any problems, nor have any of my over 400 guests. It's all a matter of perception I think. Some people think dark skin = criminal.