I wonder if other players other players have tried to cook higher artefacts and ended up with cobblestones instead. Since cobblestones have no reason to be, in Level 1, unlike in Level 0, except perhaps if they always replace the failed red circle that used to occur with those with less than 100%.
Trying to cook the top tier in beads, ends in a cobblestone, for me at least, every time I go for one using the transmutator. I have tried it at different locations without success. Has anyone else had this occur to them to, for if so, it might be a glitch.