get 2 sheeps together with a water lake behind them
breed them and the hearts sink in the water.
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[media][media]

1st: three hearts show not right
2nd: small heart above left sheep is in the water
(not confirmed on villager hearts)

66th duplicate of MC-9553, please use the search function to see if your bug has already been submitted. Currently over 56% of tickets are being closed as duplicate.