Twist like turn in a spiral or twist like twisting in on itself?
Indeed heat is a common culprit of twisting but typically you get taco leaves instead of twisting. Try raising the lights if you can. If its 82 degrees, the leaf surface is likely around 86 as it is absorbing all the energy of the bulb.
Yea anytime i have any fan leaf issues its usually becuz of heat and/or ph or a mixture of both causeing problems and wreaking havoc to one another..
Whats ur res temps?