ip6.arpa/MX has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (7)
ip6.arpa/DNSKEY (alg 8, id 21619): 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. (2620:37:e000::53, UDP_-_EDNS0_4096_D_KN)
ip6.arpa/DNSKEY (alg 8, id 29544): 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. (2620:37:e000::53, UDP_-_EDNS0_4096_D_KN)
ip6.arpa/DNSKEY (alg 8, id 64060): 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. (2620:37:e000::53, UDP_-_EDNS0_4096_D_KN)
ip6.arpa/NS: No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (2620:37:e000::53, UDP_-_EDNS0_4096_D_KN)
ip6.arpa/SOA: No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (2620:37:e000::53, UDP_-_EDNS0_4096_D_KN_0x20)
ip6.arpa/DNSKEY has warnings; select the "Denial of existence" DNSSEC option to see them.
ip6.arpa/TXT has warnings; select the "Denial of existence" DNSSEC option to see them.