Not sure what you mean here...

If you mean that when you do a render preview test in the scene room, yes, it collapses/disappears when you next do something. It's only a sneak preview. Personally I never use it. I do a lo-res render in the render room so I can switch back and forth between rooms because the render room image is written as a permanent image until you decide to overwrite it or not save it. On a mac it's faster than the scene preview as well.