This is because the character you play is a chef. This is a special mechanism of the chef. When you eat the same food repeatedly, the profit will be halved.

Warly is one of the free characters in the online version. He's a funny cook. Wally's shortcomings of being a picky eater and his advantages in the form of special dishes and seasonings determine that he is a character who requires a certain understanding of cooking pot recipes and food sources in the game to play well. For players who are new to this game, it is not recommended to play with Wally.

The following are his skills and passives:

Wally can only eat cooking pot food, and if he eats the same food repeatedly within two days, the attribute gains he will get will increase. The worse. (Only 90% gain on first repeat, 80% on second, 65% on third, 50% on fourth, 30% on five and above) Each meal resets the two-day timer.

Wally's hunger bar decreases 20% faster than other characters.