I am a first time grower so not really sure.. but what i will say is i think its normal for the leaves to die as it is flowering, my blue cheese is on week 7 and i noticed some of the bigger fan leaves dying around 4 weeks into flowering, hope this helps :)
Thanks for the reply, i have checked them with the scope and they are nearly all very cloudy, i plan on continuing to flush until Sunday and leaving to dry up a bit and harvesting on Tuesday.