Discoloration and Dying leaves

Looks like your plant has shown signs of stress since your first true leaves. A temperature of 85 degrees Fahrenheit is likely not the cause (I grow outside in warmer conditions) and your humidity looks dine to me. It looks like a nutrient issue primarily, and possibly lighting as well, but plant stress is hard to diagnose. For the nutrients, it looks like you are using granular/dry amendments. Dry amendments can take weeks or even months to become available to the plant, and it can be difficult to know how much of them your plant is getting at any given moment (experience with the exact ammendment and amount is very helpful, even if you followed the directions exactly). I also see that you added a second dry amendment, not sure if you were thinking nutrients were low? But, if you followed the directions for the first one, you could be in a place where the second is overdelivering on nutrients and can result in nutrient burn. I am tempted to think that is not the case because your issues started early (first true leaves) and before you note adding any nutrients. You could try using water-soluble fertilizer (which is available to your plant within days and you know how much nutrients your plant is getting). If you want to try something cheap and easy, Gardenwise makes several 3-1-2 fertilizers that are available on Amazon (they say stuff like, "for snakegrass," on the bottle, but that's a marketing gimic, if you look at the garunteed analysis, they are all the same) or some other 3-1-2 water-soluble fertilizer ((most plants in general grow well with this ratio, or something similar, and I am using it for my Fruity Freak 2 grow) keep in mind a 24-8-16 or other like multiples would be the same proportion of nutrients and the instructions on the fertilizer will just tell you to deliver a lower volume). Follow the instructions on the bottle. If your plants perk up, you know you are low on nutrients and you can continue using the water-soluble fertilizer (but be careful as eventually those dry amendments will deliver nutrients and you may need to back off or stop the water soluble nutrients if you see signs of nutrient burn, probably not a huge risk before you harvest your auto, but if you reuse your soil the dry amendments will probably be getting to a place of greater availability). For the lighting, I found it helpful to download the Photone App (I followed their instructions about wrapping printer paper over your phone's camera to act as a difuser) to understand how much light intensity I am delivering to the plant. You can adjust intensity by raising or lowering the light distance from your plant and/or dialing the power up and down. i found this article extremely helpful and provides a chart by week of their recommended light intensity (and I am following it for my Auto Orange Bud grow): https://growlightmeter.com/autoflowering-cannabis-lighting/ Hope this helps and happy growing!

possibly just genetic issue or her environment. Just keep proper grow conditions, Lighting, Temperature, Humidity, PH, Watering and Feeding,, and Air Flow. If all these are good, at this stage in her life, then I would count on it being genetic.