on snapshot 20w19a if the piston pushes the block into the barrier, the piston passes into the block and it will be possible to break blocks through it, and if you re-enter the world, the block will disappear
Comments 5
Maybe this will help https://twitter.com/PerfectlyCutMC/status/1270568834605301760?s=09
If the reporter was referring to the worldborder, then this is MC-82010.
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When you say the barrier, do you mean the world border?