Hello Tom, I see you are using BIND 9.18.9, can you retry with the latest version of BIND 9.18?
An issue, which looks similar to the one that you are experiencing, was fixed in BIND 9.18.10, see https://gitlab.isc.org/isc-projects/bind9/-/issues/3638 Kind regards, Aram -- Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
