The Yandex spider is a frequent visitor to one of the sites I manage. On occasion it replaces the page name with two ampersands and a space. So if the page is:
then it will try and crawl it as:
Any idea why it is doing this?
If I remember correctly the IP that this mistake is coming from is based in California and not Russia. I believe that they crawl US sites from a US based IP address. Not sure if that helps.
More information about the request:
IP: 188.8.131.52 City: Palo Alto State: California Country: United States ISP: Yandex Inc. User-Agent: Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)