The world border is no longer solid and allows players, mobs, and entities to pass through it.
Linked issues
Comments

This affects the tp command, the limit is now "9.58438958934986E15" and not 30m.
The world border is no longer solid and allows players, mobs, and entities to pass through it.
This affects the tp command, the limit is now "9.58438958934986E15" and not 30m.
gaspoweredpick
Erik Broes
Confirmed
Normal
Entities
Minecraft 1.14.3 Pre-Release 2, Minecraft 1.14.3 Pre-Release 3
Minecraft 1.14.3 Pre-Release 4
Retrieved
Relates to MC-53602