Some of my users get the above message when I load a collection proxy asynchronously. Users report that it never resolves (the game remains in a state where the level is not loaded, though other proxies like the HUD function like normal).
I find that I do not get the same message when I load a collection proxy synchronously, though doing that causes my playing music to stutter, which is why I use async loading.
Any ideas on what could possibly be causing this, or what I could possibly do to resolve it?