You have 2 types of leaves on your plant. The big ones are the "fan" leaves which are the chemical factories and solar panels ffor the plant. The other leaves are the bud leaves or "sugar leaves". The sugar leaves are the smaller leaves that grow in with the buds and get covered with the resin glands (the sugar). Often when plants are grown organically the "fan" leaves will "yellow off" towards the end of their life cycle. That doesn't necessarily mean that there is a problem but when plants are grown in "optimal conditions" this "yellowing off" occurs less.
I wasn't saying earlier that you weren't doing something wrong as much as there can be little things that can affect how the plants grow. Temps and humidity, air flow, microbe level, pH in the soil, root binding, moisture level in the soil, light intensity. Any of these things can be off enough to lend to early senescence (yellowing off) without ever showing any issues before the onset of senescence. By many growers it is considered normal.
If I remember correctly, WW is not a heavy nitrogen eater, so that could lend to the yellowing off. I think the WW doesn't get real amber at max ripeness. I would cut a sugar leaf or 2 from a couple of the buds and take them out into bright daylight to examine under the lens. You should see some that are clear and most of them cloudy, milky looking, and you may see a couple that are amber. If you don't have 90% or better milky trichs then let them go a few more days and check again. Even if all of the fan leaves die and fall off, as long as the sugar leaves are still green you are ok.