Hey Duuude ^^, you can add that to the reasons that CUL is the most annoying craft to rank up! It appears that the 1.19 Recipe Revamp notes are incorrect because the chestnut synth does still work so this is a great thing to bring to the attention of the Devs. However, I did notice on the Lodestone Play Guide (Synthesis => Cooking => Culinarian [Lv. 41-50]) that the recipe still lists chestnut chips.