I have bad leaks without ecosystems or moving between layers (or even doing test renders). It may be the use of large imported Poser files in my case. I have the undo system set to the minimum (1). Quitting and restarting Vue is the way round it, but it is tedious in the extreme to have to do this very frequently (like every ten operations in some cases). There is definitely less of a leak when working in reduced wireframe, but the visualization is so sketchy it's hard to see what one is doing.