Curling down, heat is my first thought.
Heat or overnute on the transfer. Them bitches can get real touchy when they change locations. Give it a week to straighten out. Probably worse on the soil transfers than the others. Different type of roots needed for soil vs. hydro.
In most cases I would say over watering but if your using bubble ponics it could be a lack of O2. Also some types of over fert will express themselves that way. Pics would help with a diagnosis. Give the info you provided I would have to say that there is a lack of useable oxygen to the roots. Sometimes if you use CO2 enrichment in a cealed enviroment then the air pumps end up pumping mostly CO2 into the hydro system or maybe the plants have out grown the amount of O2 being provided or maybe a pump isnt running at capacity. Heat could be the culprit but you should see raised edges along the leafs blades a mutation that occurs when the plants have to transpire way to fast to compensate with a hot enviroment. OH also if your rez temp is shooting up then the available O2 is bottoming out that could be the cause as well.
Hello friends, thank you guys for the comments. Based on your information and other sources I've looked into I feel my options are limited. The best course of action for me at this point is to do nothing. Aside from the 5 or so cupping leaves I see nothing wrong. I will try to get some pics up.