Buds turning brown while drying

Hey everyone,
I'm really confused. My Fat Banana started turning brown after 3 days of drying and i don't know if I should be worried. My temperature in the tent is around 15°C and humidity 50-58% and there is a fan running 24/7 (it is not pointing at the buds don't worry).Before harvest there was a bud that got mold and it was exactly the same color as these and I am really fuckin worried about my harvest, can anyone please tell me what the hell is going on with them?

I think that it is okay but still wanna know your opinion

Nothing obvious on the outside. Break it open and find out...?

White pistils also tend to shrivel up and darken when they dry out, if that's what you're referring to.

Cut one bud in half and it is okay, thank you man!

The only brown I see are the dead pistils...