there's a bunch of things happening slowing that baby down, first of as many have said, you're stressing her with HST even defoliation is HST to a plant - think about it you're ripping her apart after all ! Second i see you're on 12/12 from seed or 24/7 ... not sure which is which but both of these set ups will slow down an auto, plants need some dark period during veg simple as that - when i shifted from 24/7 to 18/6 my plant blew tf up ! third thing is that the night time temps are cold for these canabis plants, cold temps will slow down growth - simple as that ... my auto went 25 weeks in 2-6 °C temps. Finally you probably want to raise that solution temperature, again it's shocking the roots and holding back the plant. Lights and temperatures bro, that's what you need to fix. Hope this helps ! 🚀