The chef glitch

So has anyon noticed that the chef in Selene city has a glitch where they don’t check to see if you actually have the second ingredient required to make something?
Because I found out that I can just buy a bunch of potions and give them to the cheff, he’ll give me a full restore, and then I can sell it to buy more potions to repeat the process, all without having a single pearl (wich you supposedly need). I also noticed this about all of the pther recipes, including the one for rare candies. I can buy a single hp up and the chef will turn it into a rare candy. Although, if you DO happen to have th other “required” ingredients the chef will take those to, but It doesn’t tell you ‘no’ if you dont.
I just wanted to know if anyone else knew about this.