Twisting leaves?

Hey guys.
Anyone have any experience with this type of twisting. Is it a deficiency ?
About 4 week into flower outdoors.
Feeding one part bloom nutes to manufacturers spec's. 5mls per litre. 2:3:6
Thanks guys

Looks like possible heat stress, what’s the temps like where you live

Been up in the 25 to 30 celcius in nz

Bolognese said:

Been up in the 25 to 30 celcius in nz

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Did they get underwatered over last week or so? Some plants go mutant every now and again, ive got that and one next to it on one of the main colas has split into 3. They look good. Someone might chime in and give you a proper answer ha but i wouldnt be worried. Happy growing