I am having a similar issue, any time I leave town I get the same error.
Assertion failed: GetFName() == NAME_None [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/CoreUObject/Private/UObject/UObjectBase.cpp] [Line: 130]
Is there any safe name? Or do I just have to wait till 4.7 to be out...or wait on 4.8?