Just pointing out that it sounds like the exact same bug that Wildcard (Ark survavial of the bugs) never managed to fix in what? 10 years of shelf life?
Granted they never gaf about any bug or players or anything except stealing talent from other studios and creating a mess…
But they had the exact same issue on live servers. Whatever was attached to their dinos suddenly disappeared and was placed somewhere (randomly) at world 0,0,0.
Coud this be an issue with the mobility setting? Sure. But the resulting outcome is still a bug.
The reason one doesn’t see more threads about it, is probably exactly because the mesh or child actor or whatever attached component is just given the wrong settings in the first place - but - it sounds insane that these instances would persist when their parent is removed from the scene/level/world.
So definitely still a bug with the engine (and likely one thats been ongoing for 10+ years)…