Deficiency or environmental?

super soil was used and I have just begun using a compost tea I was previously using just revive and R.O phd water

water ph is 6.5 always

It’s hard to tell without more details, such as the soil/medium? Is it fresh? Have you been using a nutrient feed at all? Have you PH tested your water? I had a similair issue happen to me early on in my current grow. It was honestly a water ph issue. It caused a calcium deficiency in my plant. 83 is not a terrible temp, if your getting heat stress it depends on what type of light your running and how close is it to the plant? Can’t really tell in the pics provided but if your running an led it doesn’t look like it’s close enough to give you the light/heat stress your describing. The leaves themselves are not taco shelling so it leads me to believe you have a deficiency more than likely caused by improper ph if your not testing your water.