Strumpy Shader working in editor but not in build.

This is a simple dissolve shader which uses an image (_DissolveMap) and an alpha value (_DissolveColor) as arguments. It works perfectly if ran from the editor but in both web builds and EXEs it doesn't function. I've narrowed it down to argument 2 of the subtract causing the issue (The one inputting the dissolve map) but I have no idea how to fix this.