Spawn physics actor in network game

Im trying to spawn actor (contains sphere, which simulate physics) in network game. But it disappears after few seconds. Im following this tutorial - YouTube
My ThirdPersonCharacter BP:

My TestActor: “Replicates” set to “true”, contains Sphere and ProjectileMovement

How should I spawn TestActor to get the same result as in tutorial?

not sure, you have to manage spawning from your character BP.
Even, it is not the reason, manage it from a BP which stay during the game, as playercontroller…