Galaxy S6: Can't change Screen grid size after factory reset, any solutions?

[AC Question]

In short, after installing the 5.1.1 update on my S6, my phone seemed to be a little laggy so I went into the recovery menu and did a factory reset. Everything works normally, except now after the reset, for some reason I can't change the screen grid size in the panel customization menu. The button that says "screen grid" is there, but it is now greyed out and I can't use it. Any ideas?