I just tested a replica failover to the DR site, RE-IP is enabled on the job, production vm was powered off manually and failover was started from veeam console.
Problem is replica VM takes dhcp instead of using the same IP on the target subnet.
Production VM IP: 192.168.0.45
Expected replica VM IP: 192.168.100.45
Replica VM IP taken by dhcp: 192.168.100.117 --> this the ip the replica got on boot
Is the production VM set to use DHCP, or does it have a static address? If the interface is static in production, it cannot be DHCP on the replica. However, there may be a new interface: see http://vee.am/kb1570