I am having an issue with Spine in Unity where simply showing a spine character (Spine Animation, Skeleton Mesh, and Mesh Renderer) appears to keep a static reference forever, even after destroying the gameobject and calling UnloadUsedAssets and System.GC, etc. Is there some kind of cleanup I need to make sure I do?
Unity Profiler, clicking on the texture of the spine character in a detailed snapshot:

It turned out to be some kind of circular reference on my side. Nothing to see here. :$