Strange behaivior with replicated splines

I’m having a very strange issue with replicated spline shapes. This only occurs on clients, where the spline seems to “dissolve” while loading. It doesn’t dissapear entirely, rather it sort of…melts?

Here’s a video showing what I mean: - YouTube

I’m also getting this error in the console, which I think is a replication problem–but it’s just a spline, I don’t know how complicated it could possibly be.

LogNetPackageMap:Warning: FNetGUIDCache::SupportsObject: ChildActorComponent /Game/Maps/UEDPIE_1_Doors.Doors:PersistentLevel.BP_Spline_Component_Placement_C_1.ChildActorComponent_16 NOT Supported.

I’m also not using a Spline mesh component, instead I’m opting to use a “Add Child Actor Component” so that I can spawn actors along the spline.