growing problem

hi can anyone help me this is my third grow i currently have 8 females 3 weeks into flowering 5 lowriders and 3 blueberry autoflowers in the past few days the stems the buds are attached to have started to go flat and then the weight of the bud just bends it over and it dies one of the plants has a large bulge in the stem also which kind of looks like a pea is stuck in the stem this is growing ok but i would still like to know what is wrong with it all the plants are fed and watered exactly the same and yet one in particular is as healthy as ever an looks great is there anything causing this flat stem mutation or could it be bad genetics in the autoflower seeds i have never seen or heard of this problem before if anyone can help it would be very much appreciated

i could be wrong as ive only ever had males or females straight up. but i think its a hermie?
am i wrong?

What nutirents did you use?

they were all female seeds and dont seen to have any male charactaristics

i am using fox farms nutes always have and this is the first time this problem has occured

can you get us some more pics, like of the whole plant, looks like you have a root problem to me, plant is dying

deff not a hermie... looks real real bad tho, some sort of necrosis

Could either be nutrient burning (just cut back on nutes and it will spring up, discolored leaves will probably fall off but it can still be saved) OR it could be Root Rot, and the only thing that could save that is transplant and removal of as many of the "rotting/discolored" roots.

what type of light do you have