Hi @Seantiernay ,
1. It's a 6.0 release, please consider upgrading vCenter and vSphere replication to a supported version
2. Does the vSphere replication appliance and it's ESXi host have sufficient resources(CPU, memory, etc).
3. When you say VR server freezes, are you able to login to console of the replication appliance or that's frozen as well ?
4. How many VM replications are you managing with this appliance ?