Also this plant have 80 days, supposedly according to the manufacturer it is 45-50 days. The trichomes are getting amber already.Do you have good air flow around the buds? Fan on the canopy is ok you need one blowing up threw it. RH%?
The other two plants look good, no signs of mold or mildew. I think that seeing what is happening, and that the trichomes are already on the point, or lack it, it would be convenient to cut, so that in case it is mold or fungi it does not proliferate towards healthy plants, since those have about 3 -4 weeks still.