It’s common. Nothing to worry about. The plant is mobilizing the stored nitrogen in the leaves during flowering. It’s actually an indicator your plant is healthy. If the leaves were splotchy then you’d have other issues to worry about such as a deficiency. You could always hit them with some nitrogen rich fertilizer if you think the yellowing is happening too soon. It’s your call.
+1 its common. Its a combination of air temp and rootbound. She’s using the leaves for food. I slow it by burying the grow bag or you can just ride it out. Looks like you already plucked most of them.