This is a mod conflict and not sure if it is your issue or theirs.

Right now there is a conflict with the freezer (Enviromine) resetting the spice of life diminishing returns. This is repeatable.

Eat any food item until it diminishes
Place food item in freezer
Wait 3 seconds for the food to reset
Eat again for full value.

Basically the other mod adds decay to food. So it will spoil over time. It appears that your mod treats the food differently because of it.

Issue also created on their github: EnviroMine/EnviroMine-1.7#35