Whats wrong with my Gorilla lady =?

Just took a look at your diary. It seems like she is stressed from the heavy training LST, topping and as it looked on one picture you fimmed a side shoot. The low temperatures of your growing media and water/feeds also add to this slowing everything a bit down making it hard for the plant to absorb magnesium, leaves look like early stage magnesium deficiency. Go with 20-21C (your beneficials will thank you for that too) when irrigate let her recover from the training/stress and she will be fine again from what i see. Maybe consider giving her a leafspray with calmag EC:0.4-0.6 PH:6.0-6.2 as a quick aid