Is your back meant to crunch when doing leg raises?

[optimisticzoomer]

Lie on your back and do some leg raises. Does your back crunch? For me my lower back makes a crunching sound when I'm lowering my legs, at a certain point when my legs are near the ground

Idk if this is a problem

 

[optimisticzoomer]

Tbh ngl. The sound you hear at 4 seconds is my back