If he has the same problems I do, I believe he means if you try using the soft dough made in the mixing bowl immediately after making it, it doesn't actually work as a pie shell and only spawns as a phantom item. Thankfully PurpleArrowhead's solution of dropping the dough on the ground first and picking it back up is a functional workaround.
And as a another sidenote. The scrambled egg recipe using liquid egg doesn't seem to work at all despite of being written out quite clearly in the handbook.