Animals display heart particles only once when breeding

Summary:
When breeding animals, they are supposed to display heart particles for several seconds, but they only appear briefly.

Steps to Reproduce:

1. Obtain two breedable animals (e.g., cows, pigs, or sheep).

2. Feed each animal its respective breeding item (e.g., wheat for cows and sheep, carrots for pigs).

3. Observe the heart particle effect.

Observed Result:
The heart particles appear only for a brief moment before disappearing.

Expected Result:
The heart particles should remain visible for several seconds to clearly indicate the breeding process.