When i reopen it they work fine. With out Vulkan Preview they work fine.
They also making this error -
LogParticles: Warning: InitializeSystem called on an unregistered component. Template=/Game/FX/Emitters/PS_Starmap_Star02.PS_Starmap_Star02 Component=/Game/Maps/MapMenu.MapMenu:PersistentLevel.BP_StarInactive2.ParticleSystem1