I'm having issues with my bread. Using a basic recipe (yeast, water, flour, a little bit of sugar) the dough seems to develop an off smell and tastes bitter which persists through baking. This has happened more than once. I notice this change in smell as early as 30 min. into an initial rising. I've been looking around about bread developing funny tastes or smells and I can say that the smell and taste isn't sour nor are my ingredients rancid. I'm at a loss as to why this happens, because my sourdoughs and brioche come out just fine.