It is not a bug. It is a source for Kagi search results.
Also, you should not create a new issue for this. Discussion should continue in the thread you linked to.
While there may be reasons for wanting to avoid Russian companies, I still think it makes sense if Yandex offers a better experience for Kagi users.
Just because a company is based in Russia does not mean they are bad people either.
I was about to mention Jetbrains also being a Russian company, but I was wrong. Although, many of their workers are Russian and still oppose the war.
I do still see your point, and I think that if Kagi can improve their search in a reasonable way without using any Russian resources, they should do so.