Boy Klara, your orchids look nice and healthy! Nice growing!
It is very unusual for a Phalaenopsis leaf to split across the leaf. Are you sure no one is doing it as the plant gets picked up? Do you have a kitty cat who might walk around the plants? I don't think that leaves normally just split like that.
But if they stay green and look healthy, I would not worry. Like I said, they look nice and healthy!!!
