why are they curly

this is Sour Diesel and it's 5 weeks into flower. It's my first time with this strain so I don't know if it's normal that the leaves around the buds are curling like this. Any input is appreciated

Mite be slow growth had sum durban posion like that but they popped out soon I forgot how long tho

it looks alot like they are going back into veg, or at least that one plant in the photos is. i would check for light leaks and maybe go to a 10-14 or 11-13 light schedule for a few weeks