On level restart, user receives LogNetPackageMap warnings in networking project with seamless travel

On level restart, user receives LogNetPackageMap warnings in networking project with seamless travel.

Warning message:

LogNetPackageMap:Warning: Using None instead of replicated reference to MyActorClass /Games/Map/MyMap.MyMap:PersistentLevel.MyActor_C

[2015.02.23-21.18.41:479][329]LogNet:Warning: Received invalid actor class on channel 33

Could not reproduce in-house. Users project is 30 GB and he is requiring an NDA to get access. He is not able to create a smaller test project for us.