Your comments

After further discussion it is apparently making it double-sided which caused this, or maybe a combination?

Yeah I understand, don't prioritize it, but it would atleast be a good idea to catch the shortcut and do nothing, so it doesn't Undo stuff in rest of Unity, which caused some confusion for me

Unity Free. Happens consistently in the PBRTexture shader i sent you. The Texture2D node, called Base

I accidentally un-did something in the background instead when I hit ctrl-z, the focus in SF should atleast intercept that and do nothing.