Hi Unique562
I had this happening last year with a Phal. The new leaf cut the previous almost one third of the longitudinal extension while developing.
Presuming your plant is a Phalaenopsis, damaging the crown is not a good thing, especially breaking off the new leaf. The crown is the heart of that orchid. It normally has some spare meristems that allow the plant to form a new shoot from another point, but this is not assured. Good luck with your plant!