lb zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (2a05:e380:2:4::2)
lb/NS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2a05:e380:2:4::2, UDP_-_NOEDNS_)
Warnings (3)
lb/DS (alg 8, id 3842): 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. (192.112.36.4, UDP_-_EDNS0_4096_D_KN)
lb/DS (alg 8, id 3842): 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. (192.112.36.4, UDP_-_EDNS0_4096_D_KN)
lb/DS has warnings; select the "Denial of existence" DNSSEC option to see them.