How much bloom ferts are you giving them?

Looks like fert burn on the leaf pic to me.......

My friend on his 1st grow, was ferting too much, and the leaves were drying and curling up still green........

He cut back, and the plants recovered.......

But it could be salt build up, or improper Ph as well........

As for the buds, how much humidity is in your grow area?

Too much humidity will promote bud rot on buds........

If the humidity is high........

You have fans on them?

A sulfur vaporizor will help stifle bud rot too........

Hard to tell from your pics........

Just opinions.......

I have a friend that is awesome with indoor problems, I will try to show him your pics, and see what he says........

I am NOT a grower, just know some great ones!