I expected this bug to have been fixed easily, but have resorted to finally reporting it. Mobs attempt to jump over blocks that do not allow pathfinding over which includes fences, wall types, and blocks with a slab on top. I first noticed this in January 2019. The roots of the glitch seem to be pathfinding of mobs leads to an incorrect path on inaccessible blocks, making the mob become stuck in the loop of pathfinding to that specific block. The mob will continuously jump at that spot until killed or the blocks are destroyed.
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An additional note: Buttons appear to a mob as a solid block to jump onto, which is not possible. The mob repeatedly jumps above the button.
[Mod] Celesian
Thank you for your report!
We're already tracking this issue at MCPE-45256, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki
[Mod] Celesian
Thank you for your report!
We're already tracking this issue at MCPE-45256, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki
An additional note: Buttons appear to a mob as a solid block to jump onto, which is not possible. The mob repeatedly jumps above the button.