Ah, normal je tu! Lipase dalam breast milk dia akan break down fat lebih lagi kalau susu tu frozen lama-lama, so rasa jadi sedikit different, some babies don't mind, but some moms notice it. Bila warm up, colour boleh jadi kuning atau keputihan depending on how you store it (kalau dalam fridge vs freezer). A few of us tried different bottles and warmer methods, ada yang noticed the colour change lebih obvious. If you're worried about the taste or baby refusing it, maybe try warm it slowly je (bukan dengan microwave) or express fresh one untuk comfort, tapi generally it's the natural breakdown of fats, your milk is fine! Kalau baby reject consistently or ada other concerns, boleh check dengan lactation consultant just to be sure.