Normal - UEFN - Material editor - IF node stops working when swapping Color/linear Color

As seen in the video below, I am toggling textures on time, but the moment I swap “Linear Color” to “Color” IF node gives an error.

I am genuinely confused about what the issue is here, it seems technical so I’ll leave it here.

More weird is that I have another material that uses “Color” on both textures and the IF statement works there.

EDIT: Lerp node has the same issues, gives error too.