When you throw poison or shoot to a Creeper, the poison knobacks him.
Steps to see the bug:
1.Spawn a Creeper
2.Throw him poison
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The poison will knoback the Creeper
Related issues
duplicates
Comments
migrated
migrated
Sorry, rectifyng this bug that I send, poison knockbacks all the mobs
Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-95539. You can find or add further information on that report.
If you haven't, please search before reporting any bugs, as it's likely that one exists already.