I would think it was a situation of different Android Versions but the OP did have the recipes at one point so they should still have them now. Aside from limited time recipes, the general rule of thumb is once you have a recipe, you always have it.
As players, we can only compare notes and speculate; the best way to get a definitive answer on the situation would be for the OP to post about their disappearing recipes in the Bugs Forum.