I don't envy you guys trying to figure out what's causing it and find a fix for it, memory leaks can be so damn hard to identify unless you know exactly what's causing them. Even having a general idea can involve a dozen wild goose chases, I'll never forget the many hours I worked on one trying to work out how hair textures were causing it when the whole time it was a quest item causing a sorting bug in the inventory that was invisible to the player.