how to add multiple location blocks for proxy pass in nginx for specific region/URL

Question

I am trying to setup nginx for reverse proxy. But I have to do it for multiple servers which are basically for different regions. I have three regions APAC, Australia, Japan

location /au/myEndPoint1 {
          proxy_pass https://AUSTRALIA_SERVER/myEndPoint1 ;
        }
        location /jp/myEndPoint1 {
          proxy_pass https://JAPAN_SERVER/myEndPoint1  ;
        }
        location /myEndPoint1 {
          proxy_pass https://APAC_SERVER/myEndPoint1 ;
        }


        location /au/myEndPoint2 {
          proxy_pass https://AUSTRALIA_SERVER/myEndPoint2 ;
        }
        location /jp/myEndPoint2 {
          proxy_pass https://JAPAN_SERVER/myEndPoint2 ;
        }
        location /myEndPoint2 {
          proxy_pass https://APAC_SERVER/myEndPoint2 ;
        }

But when I test this for /au/myEndPoint1, I received request sometimes on location /myEndPoint1 and sometimes on /au/myEndPoint1.