Adding my 2c from experience in 5.2
I couldn’t seem to get it working with Create Instance node:
I had to switch to LoadLevelInstance (by Name):
I learned that Optional Level Name Override is essential, AND it doesn’t seem to take some characters. I’m not sure if it was a “=” or a " " (space) which broke it, but once I edited my generateUniqueStreamingLevelName function to return a unique name for every single level instance that was guaranteed to be the same on both server and client (AND WITHOUT those aforementioned characters) I was able to get it working.
Inside my generateUniqueStreamingLevelName function (if it is relevant to anybody curious):
