Actually it is not limited to that page, the "terms of service" page has the same issue from time to time. It seems that Yandex is really confused.
Even if those pages are not indexed, it is not a problem for me, but still I have some worries.
- Since there are just a few pages in total, does Yandex completely blacklist my website due to the low quality pages?
- If this is a problem, how can I fix?
Note: There is a similar question on Webmasters SE, but it is for Google.