Падает isc-dhcp-client при получении ipv6

[Илья]

VERSION="10 (buster)"
isc-dhcp-client/stable,now 4.4.1-2+deb10u1 amd64

Работает стабильно, получает IPv6 Prefix Delegation, но иногда падает. Лог:

Jul 12 00:37:59 Server dhclient[831]: PRC: Address
2a02:2111:a02:5753::1 depreferred.
Jul 12 00:37:59 Server dhclient[831]: PRC: Prefix
2a02:2111:8263:8c00::/56 depreferred.
Jul 12 00:37:59 Server dhclient[831]: XMT: Rebind on enp5s0, interval 00ms.
Jul 12 00:37:59 Server dhclient[831]: Impossible condition at dhc6.c:279.
Jul 12 00:37:59 Server dhclient[831]:
Jul 12 00:37:59 Server dhclient[831]: If you think you have received
this message due to a bug rather
Jul 12 00:37:59 Server dhclient[831]: than a configuration issue
please read the section on submitting
Jul 12 00:37:59 Server dhclient[831]: bugs on either our web page at
www.isc.org or in the README file
Jul 12 00:37:59 Server dhclient[831]: before submitting a bug. These
pages explain the proper
Jul 12 00:37:59 Server dhclient[831]: process and the information we
find helpful for debugging.
Jul 12 00:37:59 Server dhclient[831]:
Jul 12 00:37:59 Server dhclient[831]: exiting.