It looks like a bug to me, could you please fill a bug report and make a small project that reassembles your issue, also screenshots, description of your hardware and what where you trying to achieve would be great!
As that will really help the developers finding what is happening in order to solve that issue.
hello… I had same problems, had to remove all GarbageCollectUnusedAssets calls… I was calling GarbageCollectUnusedAssets in Start() method or when respawning player…
I didnt have time to investigate it more, due making RC for Samurai…