Paper/nms-patches/PathfinderGoalFollowOwner.patch

--- a/net/minecraft/server/PathfinderGoalFollowOwner.java
+++ b/net/minecraft/server/PathfinderGoalFollowOwner.java
@@ -1,6 +1,11 @@
 package net.minecraft.server;
 
 import java.util.EnumSet;
+// CraftBukkit start
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.entity.CraftEntity;
+import org.bukkit.event.entity.EntityTeleportEvent;
+// CraftBukkit end
 
 public class PathfinderGoalFollowOwner extends PathfinderGoal {
 
@@ -80,7 +85,18 @@
                             for (int l = 0; l <= 4; ++l) {
                                 for (int i1 = 0; i1 <= 4; ++i1) {
                                     if ((l < 1 || i1 < 1 || l > 3 || i1 > 3) && this.a(new BlockPosition(i + l, k - 1, j + i1))) {
-                                        this.a.setPositionRotation((double) ((float) (i + l) + 0.5F), (double) k, (double) ((float) (j + i1) + 0.5F), this.a.yaw, this.a.pitch);
+                                        // CraftBukkit start
+                                        CraftEntity entity = this.a.getBukkitEntity();
+                                        Location to = new Location(entity.getWorld(), (double) ((float) (i + l) + 0.5F), (double) k, (double) ((float) (j + i1) + 0.5F), this.a.yaw, this.a.pitch);
+                                        EntityTeleportEvent event = new EntityTeleportEvent(entity, entity.getLocation(), to);
+                                        this.a.world.getServer().getPluginManager().callEvent(event);
+                                        if (event.isCancelled()) {
+                                            return;
+                                        }
+                                        to = event.getTo();
+
+                                        this.a.setPositionRotation(to.getX(), to.getY(), to.getZ(), to.getYaw(), to.getPitch());
+                                        // CraftBukkit end
                                         this.e.o();
                                         return;
                                     }