Single shaded branch wilting/drooping.

Hi there It could just be lack of light its very dense and could do with a good bit of defoliation if photopieroid, Leafs will yellow and deteriorate if they get poor light, Also doesn’t seem much air flow fan wise? You want a bit of air pushing through it will give you more stronger branches/structure, Personally I would try to thin it out about witch would give better light lower down and better air flow, Best of luck 🌱