Pretty much the same as my previous post, mining near or in water causes the LUA to go nuts, which follows by the game slowing to a near dead crawl; pretty much to this point: Characters lagging but not controls.
Save Game (3.7 MB)
Thanks for the savefile, @SirAstrix.
@Albert is currently working on fixing these performance issues that you reported. Will keep you updated once we have some fix ready for testing.