the plant will only canabalise itself during the flower stretch if it doesn t find its nutes in the soil or through it's foliage. The rate at which the plant will seek out nutrients depends on its metabolism which in turn depends on the light schedule and the "vapor pressure deficit" (VPD). You're 10/10 VPD-wise, and your light schedule is intense actually so you can expect BIG growth ! Big growth means more nutes needed, simple as that. Therefore you should for sure expect to see some yellowing, starting with the bottom fan leaves. Since you're not going to be giving any more nutrients, you need to keep an eye on what's going on - there will be "expected yellowing", but you need to stay on top of it in case you run into som "unexpected deficiencies or related problems... does this answer your question at all? hope this helps ! 🚀