Question Shader looks VERY different on Android vs Windows

Hi, I'm working on a Hologram shader that looks like this in the editor and when I build it for Windows and WebGL:

But when I build it for Android the result is absolutely broken and different. The stripes take all the UV space or never appear depending on the settings.

I've tried pretty much everything I can think of with no luck. This is the code of this effect:

fixed stripes = floor((i.uv.y + ((_Time.x % 1) * _HologramStripesSpeed)) * _HologramStripesAmount);

stripes = 1 - step(_HologramStripesFill, rand(fixed2(stripes, stripes), _RandomSeed));

col.a *= lerp(col.a, _HologramStripesAlpha, stripes);

col.rgb += col.rgb * stripes * _HologramStripesLuminosity;

And this is the code of the rand function:

fixed rand(fixed2 seed, fixed offset) {

    return (frac(sin(dot(seed, fixed2(12.9898, 78.233))) * 43758.5453) + offset) % 1.0;

}

I'm using fixed variables and I suppose that there is some kind of overflow or something among these lines somewhere, but I have no clue where...

Using GLES3.

Any help would be immensely appreciated
This thing is driving me insane.