Problem with move

[Codein]

For some reason, when the NPC reaches directly behind the player, the position of the NPC resets to the start position. This shouldn't happen. Can anybody help me?

PHP Code:

function onCreated() {

  setshape(1, 32, 32);

  this.speed = 12;
  
  //format: idle animation, walking animation
  this.ganis = {"idle", "walk"};
  
  showcharacter();
  setCharAni("idle", null);
  
  setTimer(0.1);
}

function onPlayerChats() {
  switch (player.chat) {
    case ":destroy":
      destroy();
      break;
    
    case ":follow":
      this.following = true;
      setTimer(0.1);
      break;
    
    case ":stop following":
      this.following = false;
      setTimer(0.1);
      break;
  }
}

function onTimeout() {
  this.nick = this.attr[5] @ "'s Pet";
  
  if (this.following == true) {
    
    //get the coordinates that are directly behind the owner
    for (pl: players) {
      if (pl.account == this.attr[5]) {
        temp.newxy = {
                      pl.x + 0.5 - (vecx(pl.dir) * 3),
                      pl.y - (vecy(pl.dir) * 3)
                      };
                    
        //pl.chat = vecx(player.dir) SPC vecy(player.dir) SPC player.dir;
        break;
      }
    }
    
    //work out delta_x and delta_y for move
    temp.dxy = {
                temp.newxy[0] - this.x,
                temp.newxy[1] - this.y
               };
    
    
    this.dir = getdir(temp.dxy[0], temp.dxy[1]);
    
     //set the animations
    if (this.x == temp.newxy[0] && temp.y == this.newxy[1]) {
       if (this.ani != this.ganis[0]) {
        setCharAni( @ this.ganis[0], null);
       } 
     }
  
    else {
      if (this.ani != this.ganis[1]) {
        setCharAni( @ this.ganis[1], null);
      }
    }
    
    //work out the distance and time to cover that distance
    temp.dist = getDistance(temp.dxy[0], temp.dxy[1]);
    temp.time = temp.dist/this.speed;
    
    move(this.dxy[0], temp.dxy[1], temp.time, 4);
    
    
    if (temp.time < 0.1) temp.time = 0.1;
    
    setTimer(temp.time);
  }
}

function getDistance(temp.x, temp.y) {
  temp.dist = (temp.x ^ 2 + temp.y ^ 2) ^ 0.5;
  return temp.dist;
}