Particle Emitters Disappearing + Level Changing

[fowlplay4]

Alright here's my effect:

PHP Code:

if (created || playerenters || timeout) { 
  with (findimg(50)) {
    x = player.x;
    y = player.y;
    attachtoowner = true;
    attachoffset = "-2.5,-2,0";
    image = "light2.png";
    layer = 3;
    red = .2;
    green = .5;
    blue = 0;
    alpha = .9;
    zoom = .4;
    layer = 2;
    if (particleeffectsenabled) {
      emitter.delaymin = .4;
      emitter.delaymax = 1;
      emitter.nrofparticles = 1;
      emitter.firstinfront = false;
      emitter.attachposition = true;
      emitter.continueafterdestroy = true;

      emitter.particle.lifetime = .5;
      emitter.particle.image = "g4_particle_cloud.png";  
      emitter.particle.red = 0;
      emitter.particle.green = 1;
      emitter.particle.blue = 0;
      emitter.particle.alpha = .9;
      emitter.particle.zoom = .5;
      emitter.particle.speed = 0;

      emitter.removemodifiers();
      emitter.addlocalmodifier("once",0,0,"x","add", 2, 2.5);
      emitter.addlocalmodifier("once",0,0,"y","add", 1, 2);
      emitter.addlocalmodifier("once", 0, 0, "spin", "replace", 1, 3);
      emitter.addlocalmodifier("once", 0, 0, "zoom", "replace", .5, .8);
      emitter.addlocalmodifier("once", 0, 0, "alpha", "replace", .6, .9);
      emitter.addlocalmodifier("once", 0, 0, "green", "replace", 1, 1);
      emitter.addlocalmodifier("range", 0, .5, "alpha", "add", -1, -1);
    } 
  }
  setTimer(1);
} 


Standard procedure it just gets placed into a player's attr to display a poison ticking effect, then if you or the person with the effect changes levels it disappears.

If I 'refresh the effect' (clear the attr and re-add) it works fine and updating the gani file causes it to work as well.

I'm hoping there's a way to fix this in the gani file or if it's a bug that needs to be fixed.

See attached for the aftermath of changing levels.

Edit: Added the changes that made it work the way I wanted it to.