yandex.ru/A: No response was received from the server over UDP (tried 7 times) until the NSID EDNS option was removed (however, this server appeared to respond legitimately to other queries with the NSID EDNS option present). See RFC 6891, Sec. 6.1.2. (2a02:6b8::1, UDP_-_EDNS0_4096_D_KN)
yandex.ru/NSEC3PARAM has warnings; select the "Denial of existence" DNSSEC option to see them.