Create js sprite freezing on first frame - createjs

Question

Pulling my hair out with this one, hope its not something silly. Below is a snippet of code from a program. When leftwalker.x == 150 he should gotoAndPlay the standstill animation but it only plays the first frame, the previous animation runs fine. Any ideas?
var data =
{
images: ["images/ste_basic_wand.png"],
frames: {width:64, height:64},
animations:
{
// start, end, next, speed
walkright: [143,151,"walkright",1.18],
walkleft: [118,125,"walkleft",1.18],
stand:[39,45,"stand",0.08],
standstill:[26,27, "standstill", 1.2]
}
};
var spriteSheet = new createjs.SpriteSheet(data);
leftwalker = new createjs.Sprite(spriteSheet);
leftwalker.name = "lefty";
leftwalker.framerate = 30;
leftwalker.x = 100;
leftwalker.y = 100;
leftwalker.currentFrame = 0;
leftwalker.scaleY = leftwalker.scaleX = 2;
leftwalker.gotoAndPlay("walkright");
stage.addChild(leftwalker);
createjs.Ticker.setFPS(10);
createjs.Ticker.addEventListener("tick", tick);
}
function tick(event) {
if(container.x < 150)
{
container.x += 5;
}
if(leftwalker.x < 150)
{
leftwalker.x += 2;
}
if(leftwalker.x == 150)
{
leftwalker.gotoAndPlay("standstill");
}
// if (circle.x > stage.canvas.width) { circle.x = 0; }
stage.update(event); // important!!
}

Answer 1

The reason this happens is because you are calling gotoAndPlay("standstill") during the tick. Once you reach 150, your sprite stops moving, so it is perpetually at x=150. This means each tick will tell it to gotoAndPlay the same frame, resulting it in being "stuck".

Answer 2

Figured out a way around it, still not sure why but easaljs didn't like the code
if(leftwalker.x == 150)
{
leftwalker.gotoAndPlay("standstill");
}
When I change it so the char isn't stuck on point 150 (move him to 151) the animation begins. I also slowed the animation on the standing still down to make it seem more real but this isn't related to the fix I didn't post this code.
if(leftwalker.x == 150)
{
leftwalker.gotoAndPlay("standstill");
if(leftwalker.x < 180)
{
leftwalker.x += 1;
}
}