Flowering question

Hi All,

I have a blue cheese in soil flowering at 4 weeks. Everything looks pretty good aside from some yellowing/burning of the lowest set of fan leaves. However, out of about 12 colas (major LST), the pistils on 3 or 5 of them have turned completely orange/brown and look like they either retracted into the calyx or are "burnt". An odd part is they are lower colas (not the lowest), and other ones are higher up closer to the light = more heat. If it were heat, I would think that the higher up colas would burn first. Any ideas?

Thanks

You could be stressing the plants with the major lst'ing lol but would it be possible to get a pic up here it would be alot more helpful in determining the cause.