UPDATE 
I just found out what happened.
The scalability adjustment clipped the pool (without me realizing it).
Cmd: r.Streaming.PoolSize
r.Streaming.PoolSize = "800" LastSetBy: Scalability
Cmd: r.Streaming.PoolSize 2000
r.Streaming.PoolSize = "2000"
LogContentStreaming: Texture pool size now 2000 MB
So just resetting the poolsize will fix things back to normal 