You're not losing her, its the food in your soil you lost.
You have a very small pots and looks like not enough water and food for the plant. Do leaves move up right after watering and get down again in a short time like a day or half? If so, you need to water and feed more often. You're already using half dosage food and dividing it to three. Give more food, not just water.

Other things looks normal and has nothing to do with this issue such as temps or light distance. Temps on canopy looks high because of direct light. It effects on thermometers. Its like putting a thermometer under direct sun light.



I just read your last post now, and changing pots is a better idea of course. You'll be just fine after that. After repotting keep your feeding schedule for a while (2 weeks at least, depends on soil) then raise it. Don't give gro, give bloom.