XoT crash

This happens on main:

BIND 9.17.10 (Development Release) <id:13d23b0>

core named.conf

Tail of log:

08-Mar-2021 13:58:29.080 zone_timer: zone xot.rocks/IN: enter
08-Mar-2021 13:58:29.080 zone_maintenance: zone xot.rocks/IN: enter
08-Mar-2021 13:58:29.080 queue_soa_query: zone xot.rocks/IN: enter
08-Mar-2021 13:58:29.080 zone_settimer: zone xot.rocks/IN: enter
08-Mar-2021 13:58:29.080 soa_query: zone xot.rocks/IN: enter
08-Mar-2021 13:58:29.080 queue_xfrin: zone xot.rocks/IN: enter
08-Mar-2021 13:58:29.080 zone xot.rocks/IN: Transfer started.
08-Mar-2021 13:58:29.080 zone xot.rocks/IN: requesting IXFR from 3.126.83.50#853
08-Mar-2021 13:58:29.080 zone xot.rocks/IN: got TLS configuration for zone transfer: success
08-Mar-2021 13:58:29.092 transfer of 'xot.rocks/IN' from 3.126.83.50#853: connected using 3.126.83.50#853
08-Mar-2021 13:58:29.092 transfer of 'xot.rocks/IN' from 3.126.83.50#853: resetting
08-Mar-2021 13:58:29.104 transfer of 'xot.rocks/IN' from 3.126.83.50#853: connected using 3.126.83.50#853
08-Mar-2021 13:58:29.104 transfer of 'xot.rocks/IN' from 3.126.83.50#853: failed while receiving responses: REFUSED
08-Mar-2021 13:58:29.104 zone xot.rocks/IN: zone transfer finished: REFUSED
08-Mar-2021 13:58:29.104 zone_settimer: zone xot.rocks/IN: enter
08-Mar-2021 13:58:29.104 queue_soa_query: zone xot.rocks/IN: enter
08-Mar-2021 13:58:29.104 transfer of 'xot.rocks/IN' from 3.126.83.50#853: Transfer status: REFUSED
08-Mar-2021 13:58:29.104 transfer of 'xot.rocks/IN' from 3.126.83.50#853: Transfer completed: 0 messages, 0 records, 0 bytes, 0.001 secs (0 bytes/sec) (serial 0)
08-Mar-2021 13:58:29.580 soa_query: zone xot.rocks/IN: enter
08-Mar-2021 13:58:29.580 queue_xfrin: zone xot.rocks/IN: enter
08-Mar-2021 13:58:29.580 zone xot.rocks/IN: Transfer started.
08-Mar-2021 13:58:29.580 zone xot.rocks/IN: requesting IXFR from 2a05:d014:d33:2020::1111#853
08-Mar-2021 13:58:29.580 zone xot.rocks/IN: got TLS configuration for zone transfer: success
08-Mar-2021 13:58:29.588 transfer of 'xot.rocks/IN' from 2a05:d014:d33:2020::1111#853: connected using 2a05:d014:d33:2020::1111#853
08-Mar-2021 13:58:29.588 transfer of 'xot.rocks/IN' from 2a05:d014:d33:2020::1111#853: resetting
08-Mar-2021 13:58:29.600 transfer of 'xot.rocks/IN' from 2a05:d014:d33:2020::1111#853: connected using 2a05:d014:d33:2020::1111#853
08-Mar-2021 13:58:29.600 transfer of 'xot.rocks/IN' from 2a05:d014:d33:2020::1111#853: failed while receiving responses: REFUSED
08-Mar-2021 13:58:29.600 zone xot.rocks/IN: zone transfer finished: REFUSED
08-Mar-2021 13:58:29.600 zone_settimer: zone xot.rocks/IN: enter
08-Mar-2021 13:58:29.600 queue_soa_query: zone xot.rocks/IN: enter
08-Mar-2021 13:58:29.600 soa_query: zone xot.rocks/IN: enter
08-Mar-2021 13:58:29.600 view.c:1612: REQUIRE(transportp != ((void *)0) && *transportp == ((void *)0)) failed, back trace
08-Mar-2021 13:58:29.600 named(+0x2261f) [0x55cfb417161f]
08-Mar-2021 13:58:29.600 /usr/local/lib/libisc-9.17.10.so(isc_assertion_failed+0x10) [0x7f149821d790]
08-Mar-2021 13:58:29.600 /usr/local/lib/libdns-9.17.10.so(dns_view_gettransport+0x82) [0x7f1498107452]
08-Mar-2021 13:58:29.600 /usr/local/lib/libdns-9.17.10.so(+0x17f00b) [0x7f149812200b]
08-Mar-2021 13:58:29.600 /usr/local/lib/libisc-9.17.10.so(+0x6cc01) [0x7f1498238c01]
08-Mar-2021 13:58:29.600 /usr/local/lib/libisc-9.17.10.so(isc__trampoline_run+0x56) [0x7f1498240486]
08-Mar-2021 13:58:29.600 /lib/x86_64-linux-gnu/libpthread.so.0(+0x9609) [0x7f1497bd1609]
08-Mar-2021 13:58:29.600 /lib/x86_64-linux-gnu/libc.so.6(clone+0x43) [0x7f1497acf293]
08-Mar-2021 13:58:29.600 exiting (due to assertion failure)