Just to document, I've been seeing "eth0: failed to renew DHCP, rebinding" messages appear in 6.7+
Looking back it started with 6.7.0-rc8. rc7 and older did not throw the message. Seems to be cosmetic at least.
6.7.0-rc6 == good // dhcpcd: version 7.1.1
6.7.0-rc7 == good // no dhcpcd changes, logs last entry was: May 5 12:32:34
6.7.0-rc8 == bad // dhcpcd: version 7.2.0
May 6 10:02:35 husky dhcpcd[1603]: eth0: failed to renew DHCP, rebinding
Looking at the source, I dont see anything that stands out:
https://github.com/rsmarples/dhcpcd/compare/dhcpcd-7.1.1...dhcpcd-7.2.0