Leaf degradation of some kind

1st grow and I have two clones towards the end of flowering that both have this strange leaf problem. It's happening on the leaves towards the (vertically) middle of the plant mostly. Some on the low branches but nearly none on the top leaves directly under the light. I don't think it's light burn for this reason as well as the edges of the leaves are not curling up. Any ideas? Thank you very much for your time.

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Interior fan leaves can be expected to go to shit in late flowering. Your plant is at the end of it's life cycle. So it goes.

Their mother plant's fan leaves died off towards the end of flower too but they did it much differently. The whole leaf would shrivel at once and uniformly. It would turn yellow then die completely. This looks more like a disease or something since it's affecting random parts of the leaf and not others.

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Deterioration of late flowering fan leaves can take many forms depending on what nutrients are still left and what is needed. You really can't do anything about it at this point. If your buds look good, you are good.

Thanks a bunch.

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Phosphorus toxicity imo. In time it will likely spread unless you flush.

You are burning the living shit out of your plant with nutrients