I recently updated Unity from 5.5.2 to 5.6.1 since I started a new project and figured it would be a good time to do so.
In one of my scripts I had a blinking glow functions that adjusted the emission value to create the effect.
In 5.5.2 it worked in the editor without any special needs or anything of that sort.
In 5.6.1, it no longer works in the editor by default and to get it to work in the editor I have to open up the material on the object in the inspector or put on a different shader on it which causes it to lose the texture reference until I open the material up in the inspector.
I read that I have to use enable keywords to get the materials to work right in the editor at run time but I haven’t been able to find a reference to what keywords are available.