After searching even more inside the world partition logs I have found something interesting, unreal seems to confuse something with my actor.
This is the log entry of world partition when I execute it inside the viewport:
- Guid:CD32052B4878AD40002533B6AC60F640 BaseClass:/Game/Interactables/Pages/APageRegion.APageRegion_C NativeClass:/Script/Engine.Actor Name:APageRegion_C_UAID_701AB82A73F2E70F02_1367040001 Label:APageRegion SpatiallyLoaded:0 Bounds:IsValid=true, Min=(X=89500.000 Y=890.000 Z=1240.000), Max=(X=89700.000 Y=1090.000 Z=1440.000) RuntimeGrid:None EditorOnly:0 RuntimeOnly:0 HLODRelevant:0 ListedInSceneOutliner:1 IsMainWorldOnly:1 HLODLayer:/Game/HLOD/HLOD_NoSpatially.HLOD_NoSpatially
That is what I expect from my settings and everything is fine.
But now to the standalone mode log entry:
- Guid:CD32052B4878AD40002533B6AC60F640 BaseClass:/Game/Interactables/Pages/APageRegion.APageRegion_C NativeClass:/Script/Engine.Actor Name:APageRegion_C_UAID_701AB82A73F2E70F02_1367040001 Label:APageRegion SpatiallyLoaded:1 Bounds:IsValid=true, Min=(X=89500.000 Y=890.000 Z=1240.000), Max=(X=89700.000 Y=1090.000 Z=1440.000) RuntimeGrid:None EditorOnly:0 RuntimeOnly:0 HLODRelevant:0 ListedInSceneOutliner:1 IsMainWorldOnly:0
I don’t know why but unreal seems to set it to spatially loaded.
After some more research I found out that it works when I package my project.
So I guess its a bug from unreal to set actors to spatially loaded in standalone mode.