Yeah, this is a known issue[^1]. If you compile the code yourself with
the proposed patch, it should work[^2]. Note I don't run -current, so
I'm merely speaking as a reader. I recommend staying in the loop with
upstream seeing how disruptive issues with dhcpcd can be. I always look
at the issues on GitHub before updating it.

[^1]: https://github.com/NetworkConfiguration/dhcpcd/issues/555
[^2]: https://github.com/NetworkConfiguration/dhcpcd/issues/555#issuecomment-3546211800