Hi, I am trying to find a way to know when the level is loaded after a seamless servertravel. Since OnPostLogin will not be called (no actual disconnection) I thought that the BeginPlay of the level was a nobrainer. This is my issue : The Event BeginPlay of the Level Blueprint is not executed on …

Okey, it is not executed on the clients. You need to check on each tick on the clients if they finished loading the map by check if there controller is a local controller (means it has been possessed).