I noticed this when playing my super sim, who has nearly all the aspiration traits (including Hardly Hungry), in a new save. This only started happening after the last patch. The hunger need depletes as if she doesn't have either of the hunger-related traits.
I play on PS5.
Also, her energy depletes very slowly despite having both the Seldom Sleepy and Never Weary traits.
Edit By Crinrict: Adjusted Title fit migrated bug report: [ARCHIVED] Hunger decay despite forever full | EA Forums - 11437488
Archived thread had around 9 me toos