is curling new leaves normal or problem?

Grow log: regular
Strain: Unknown
Seed Bank: Unknown Bank
Vegetative

Day 26


my cargo just arrived i am very very happy
you can see, one of thems new leaves curlıng

looks okay to me. the slight lifting up is good. its reaching for light. if the tips start to curl up/in its heat stress. move light up a tad. it does that to help retain moisture.