Replicated Child Actor inside another Child Actor does not replicate correctly

Development Programming & Scripting Blueprint
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1

Hi Epic,

It appears that replication does not work properly when a replicated actor is a child of 2 parents. I have a blueprint, which contains a building (child actor) which has child actors actors inside of it (doors) which are replicated. The doors work with the building itself, but not when the building has a parent itself. When I try open the door the server throws this error:

[2017.11.12-11.02.02:868][815]LogNetPackageMap: Warning: UPackageMapClient::InternalLoadObject: Unable to resolve default guid from client: PathName: bp_door_GEN_VARIABLE_bp_door_C_CAT_144995, ObjOuter: /Game/Maps/City.City:PersistentLevel

NOTE: This only happens in packaged builds or standalone. PIE works in both scenarios.

— DOES NOT WORK —

Blueprint (Not Replicated)

Child Actor Blueprint (Not Replicated)

Child Actor Blueprint (Replicated)

— WORKS CORRECTLY ----

Blueprint (Not Replicated)

Child Actor Blueprint (Replicated)

2

I can second this big issue.
Using a parent blueprint who’s parent class was actor ("— WORKS CORRECTLY —" technique) mostly fixed the issue as seen under “— DOES NOT WORK —”.

3

Make sure that both the child actors and the parent actors have Always Relevant set to true. If its a child component, set Component Replicates to true.