Dhcpd randomly returns the IP address or the backup IP

[Wayne Gemmell | Connect]

Hi

When my dhcp server gets a DHCPRELEASE followed by a DHCPDISCOVER then it
randomly allocates the IP address or the backup IP address that are
assigned to the host in the lease file to the host. The assignments always
got to the correct host and the mac address doesn't change.

When this backup IP address is allocated then dynamic DNS isn't updated and
my container is unreachable.

I've put all the relevant details in the link below but am more than happy
enough to furnish anything that is missing. Can anyone help please?

https://gitlab.isc.org/isc-projects/dhcp/-/issues/172

<https://connect-mobile.co.za/mobile_marketing_solutions/>
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