I would suggest creating issue at github.com/systemd/systemd repository.
I have not tested it, but sounds like it should be fixed.
On 12. 07. 23 0:39, Muggeridge, Matt wrote:
Hello there!
In our IPv6 network, the address of a Recursive DNS Server (RDNSS) is
supplied in a Router
Hello there!
In our IPv6 network, the address of a Recursive DNS Server (RDNSS) is supplied
in a Router Advertisement (RA), with a lifetime of 60 seconds.
It appears that RDNSS lifetime is not being honoured (RFC 8106, section
