I literally only ever get bad block lag when placing dirt. Nothing else. In any case, it's all client side so there's nothing the server can do about it.
I have insane block lagz. When i try to make like a tool or something, i can make a hoe instead of pickaxe for example. Also, i have to break a stone block about 3-4-5 times before it gets destroyed. This only happends sometimes.
Have you tried relogging/closing Minecraft (or other programs)? Sometimes if your computer is running several programs, it causes parts of Minecraft to lag. For the most part, if the lag isn't server lag, restarting can fix your issue. Hope maybe this helps
