Endermen pathfinding in 1.13 is slightly different than in 1.12.2 where they look for the simplest path that will get them close to the endermite instead of the optimal path that will get them closest to the endermite like in 1.12.2. There are some cases where this change has caused problems. For instance, with a certain enderman farm design (shown in the video) that works perfectly in 1.12.2 but stops working properly in 1.13 due to the pathfinding change.
Video showing this bug (endermen): https://www.youtube.com/watch?v=6bPVEC38N9M
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I guess there is an issue with the pathfinding in 1.13 in general..
Tried also zombie and villager: same problem
I attachted some pics
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Relates to MC-132985
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Did some testing and the zombie pathfinding is just fine. Their behaviour is the exact same in 1.13 as they are in 1.12.2. Enderman pathfinding is the same way too but their pathfinding in 1.13 is different in some situations, one of them being an enderman farm design. I also used that enderman farm design with zombies and they do the intended behaviour in 1.13. They still look for the optimal path that is within their pathfinding limits, but instead, it looks for the path that will get them CLOSEST to the endermite or villager instead of the most POTENTIAL path like in 1.12.2 (at least, I think that's how it works).
Irbis
Does MC-135803 describes this issue?
violine1101
Resolved as a duplicate of MC-134847. All mobs have issues with pathfinding over slabs.
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@violine1101 This is not the problem: they don't find the way in general 🤔
The mobs should normaly walk through the way.
In this case its only confined with slabs, but there can be normal blocks as well.. You can look at the pics.
violine1101
If there aren't slabs, but normal blocks, the endermen properly find the way. I checked.
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Hmm ok, i will try...
Thx🤗