*So basically I started up my Minecraft and I played on my old world. Some issues i experienced was that when I dug with a shovel on some blocks, the blocks didn't fully show its disappearance until like 3 seconds after. I tried the same thing in a fresh new world and instead when i dug with my hand the block still showed even after i dug it when finally it disappeared 2 seconds after.

*What I was expecting to happen was that when i broke a block the block would immediately be broken and no lag or slowness will overcome the block.

*What actually happened was that instead of a block breaking at the expected time it had a slight delay while still showing the block as well as i could have still gone through it.

Steps to Reproduce:
1.Go up to sand, dirt, cobblestone,sugarcane,tall grass,etc
2.Test to see if the block properly breaks
3. If the block breaks correctly, try other blocks and surely the bug will appear if you do constant mining and digging of the same and different blocks.