Chop it right now, if you have bud rot it’ll eat your whole plant. It’s a fungus and it moves fast. On the bright side it looks like she’s almost ready anyway so you’re not losing out on too much.

I’d also probably do a bud wash, 5 gallon bucket with a little hydrogen peroxide and just kind of swish your buds around in there before you hang them up to dry. The bud wash should kill or wash away the spores so they don’t rot in drying.

Inspect your remaining bud thoroughly, too, of course. You’d rather miss out than smoke bud rot.

Bud rot sucks but at least there’s always next year.