It is not very subtile. I am a German dude with Russian roots. When I write in my tinder profile that I have Russian roots, I get nearly 0 matched from German g

It is not very subtile. I am a German dude with Russian roots. When I write in my tinder profile that I have Russian roots, I get nearly 0 matched from German girls. When I remove that sentence (same pics, the rest of the profile is same) then I get matches from German girls. A few weeks ago I wrote that I have British roots and I got flooded with matches. Not sure of the algorithm was showing my profile more or just girls are racist towards some nations.