Since Augusts dhcpcd update to net-misc/dhcpcd-7.2.3 dhcpcd has often missed actually updating the interface when a change happens. Even issuing a manual dhcpcd -n <interface> doesn't work, but restarting the interface gets everything working again. Its the WAN interface to the ISP so can only see my side of the link.
Is anyone else seeing this? BillK