First activation of Niagara effect with meshes always dropping FPS

Development Character & Animation
1

Hello!
When I load my project and actvate/trigger actor with Niagara fx Mesh Render, there’s always freezing at the moment. I suppose, that’s because this actor load meshes inside it.
How can I preload all meshes BEFORE first trigger? Actor placed in level and I can use its BeginPlay - but which one of Niagara nodes supposed to be used? Something “LOAD ALL MESHES NOW (begin play), NOT WHEN YOU FIRE IN THE MIDDLE OF CUTSCENE!”

2

Well, more info: it’s white text “PreparingShaders (2)” on the screen while freeze. A few moments - and it’s gone, with freezing out.