The destination ESXi host will send a RARP packet to the switch once the vMotion process has completed, but that doesn't appear to be happening in your case. I'd suggest this to start. Bring up the properties for both the vSwitch (used for VM traffic) and the portgroup and check the Notity Switch setting on the NIC Teaming tab. If it is set to NO then no RARP packet is sent.
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