After the last update the chunks load slower, when placing or removing a block has a delay of the placing or removing animation as well as the sounds.

When you placed or removed a block there is a delay in the animation of the action that is done as with the sounds, such as when opening or closing a door, when placing or removing a block, when falling. In addition to that the optimization that it had in previous versions when loading the chunks was better since it now takes much longer to do so.