I’ve had the same with my little one getting lazy/sleepy as soon as he latches. You could try a nappy change in between breasts and then leaving his clothes off for skin to skin while feeding. That worked for me a few times.
My baby is the same! She stopped opening her mouth properly to get a deep latch. I am trying new positions now.
He latches fine most of the time; but some times it’s like he can’t be arsed 😂 he’s fully alert, wide eyed and looking around, just hungry but lazy 😂
I've had the same issue last couple days and looked it up and found that it can be position or a different taste to your milk?