The bug
A boat with two non-player passengers will have only one passenger when the world is saved and re-loaded, if the x/z coordinates of either passenger are in a different chunk than the x/z coordinates of the boat. (The saved passenger is the one whose x/z coordinates are in the same chunk as the boat.)
How to reproduce
In a single-player world, summon a boat along a chunk boundary with two passengers, then save the world and re-load. For example:
/summon boat 8.0 63.0 0.0 {Passengers:[{id:wolf},{id:chicken}]}→ ❌ Upon re-loading the world, only the wolf will remain
Example
Here is an example in video:
[media]Related issues
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Attachments
Comments
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Irbis
you can use {.code.} (without dots) at beginning and at end of code to get like:
/summon boat 8.0 63.0 0.0 {Passengers:[
{id:wolf},
{id:chicken}
]}
tryashtar
Confirmed, attached screenshot for help in reproduction
Felix Jones