"Net Load on Client" actors block user input and OnPostLoadMap is called before actors are loaded

In our game we have paint splatters which are actors with decals and some logic. There are a lot of these splatters very quickly and they are all checked for “Net Load on Client”. The problem is that when a player loads a map they still have to wait for these splatters and any other Net loaded actors to load one by one before they can move around. Is there some gameplay structure that can be used to determine when everything truely has been loaded?

For my loading screen I use the MoviePlayer which has an internal binding to OnPostLoadMap. This callback is called before all splatters are loaded in.