How to more accurately estimate the budget in Yandex.Direct?

Question

Yandex.Direct

In the process of selecting options for an advertising campaign in Direct, I came across a strange and incomprehensible thing: requests in different combinations cost different amounts of money. In the screenshots below, an example of how an unrelated request raises the cost of a click on windows by more than 2 times.

Who faced similar? Which of the direct estimates should be trusted more, and do ads in the same campaign affect the final cost of each other?