That is a problem, and also as someone else pointed out the yeast is another, but also in my experience water is as well. I don’t know if it just dries out differently because of the change the in mass to surface area ratio or what, but for whatever reason you have to change the ratio of flour to water when you change the scale of a recipe. It can even make a difference just to be at a different altitude. Baking is a weirdly complex mix of chemistry and even sometimes biology. The more I learn about it, the more surprised I am that it ever even works.
Its an issue with hydrolizing, which is to say the rate at which the flour absorbs the water and begins the process of gluten development.
Stovetop cooking is the intersection of organic chemistry and performance art. Baking is the intersection of organic chemistry and witchcraft.
