My computer is always on. Unity is always on. Recently I've been doing animation work, and falling asleep with the animator window open. When I wake up, (8 hours later or so) Unity is constantly updating (a pop up comes up that says "hold on " for about 2 seconds, then goes away, then 10 seconds later it pops up again) I checked the memory usage, and it is up to 13+ GB, it was nothing like that when I went to bed. My usual set up has the animator window as one of the windows, (I always have Game, Scene,A bunch of shadergraphs, Heirarchy, Inspector, Project, Console, and Animator windows active, and Animator is usually hidden) Now that I think about it, it is also what was causing this issue for me: https://forum.unity.com/threads/force-editor-to-release-memory.884761/#post-6984437 I tried to blame shadergraph, but noticed sometimes even with little shadergraph work, this happened. However, I was also using animator at the time when I was working on my complex shader. This memory leak has been occurring for at least a year, because I remember waking up to the same thing at least a year ago a couple of times. For this to occur, the animator window has to be visible. If it is hidden/covered by another window, the bug does not occur.