Revealing mistake: In the first scene at the beach, where Ali carries Stephanie to the water, you can see the shadow of her legs, despite her legs being amputated. (00:41:25)
Suggested correction: Can you? You can see his shadow for sure, but I don't see her shadow cast on anything. I was looking for this mistake on Prime - I added the timecode for the scene too (41:25) in case someone wants to check out and maybe submit a screenshot, too - but I personally can't see it.
Other mistake: When Ali first carries Stephanie to swim in the sea, she is wearing a bra, but only removes a T-shirt in the water. (00:41:35)
Continuity mistake: The first time they go to the beach together, Alain is sleeping while Stephanie is swimming. When she wakes him up with her potent whistling, he has his hand on his belly that touches the bathing shorts'upper band in the first shot, but the hand is in a different position above his bellybutton in the wider angle. (00:43:05)