I created a shovel with Efficiency IV and Unbreaking III. It digs incredibly fast, possibly too fast. Often when digging dirt or sand if I hold Left click and dig out an area, there are several areas that I am unable to walk through. It's as if there's an invisible block in my way. If I place a block into this invisible blocks place, the original block (dirt, sand, gravel) reappears. I am able to redig it. Only after that can I travel through the empty space unhindered.
I have tested this with a shovel with Efficiency II and did not have any issues.
It has something to do with the Efficiency IV enchant.
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galaxy_2alex
Duplicate of MC-858
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I noticed this same problem on iron shovels with efficiency III, and diammond shovels with efficiency III (at least) possible with IV too.
I am a programmer and have played minecraft a lot so, what I think its that somehow its so fast that the update of the chunk gets somehow wrong (as if it where done in paralell and one is overriten).
as this does NOT happen when trying to do it slowly (barelly pressing the mouse).
but truly not the idea.
also, I Had that problem once digging down (from a 1 line of dirt), and i got stuck and sofocating, lucky i jumped a few times and was able to jump to a side (but if will have done it straight down mostly sure will have been fully sofocated). the version i tested this is in 1.12.2