Fabric, Pre-cuts to wash or not for quilting

[SusieQ]

I am a pre washer generally, however I recently bought some Pink Batik fabric at my local quilt shop and didn't prewash it. I was very disappointed to learn the color ran when it got wet! I was shocked since it was good fabric and I paid dearly for it. Didn't have any color catchers around but it literally ran so bad onto my white, I had to throw out the blocks I was doing and start over, so I say, always pre wash as a precautionary. I won't be making that costly mistake again hopefully!

I say all this, and I DON"T prewash precuts. I have not had ANY precuts Bleed, don't know the reasoning behind it, may be just luck on my part! LOL!