Missing Master Leatherworker: Demimateria recipes from Crafting Log

I noticed this issue yesterday evening when I went to look for something I wanted to craft. After searching all of my crafters and resorting to a Google search, I came to the conclusion that somehow my LTW demimateria book recipes have been deleted from my crafting log, sometime shortly before or shortly after the recent 2.5 patch update.

I have proof that I purchased this book and unlocked the recipes: I have Chocobo Pillars crafted by yours truly.

While I can purchase the demimateria book easily enough, I figured I would report this as an in-game bug. Also, I shouldn't have to pay for the book again.

I play on a PS4, on Gilgamesh. I do not know what else is needed of me at this time for this report. Please let me know what else you may need and how I may get the information for you, SE.

Thanks