Why did the search query link to another page?

Question

Search Engine Optimization

For almost a year, a number of search queries have linked to an internal page of the site that matches their content. After the last update there was a sharp collapse. Some requests were knocked out of the search, while others began to refer to the main one with a decrease in the top. What could be the problem?

Answer 1

We got to the bottom of the Yandex master and that's what he gave out.
The page does not fall under any sanctions. 3 months did not change at all. We wrote to the support waiting ...
------------------------------------- -------------------------------------------
Answered from support
Already set up redirects. Thanks everyone.

Answer 2

the algorithm has changed, your KO