Mulberry tree infection?

I have a black mulberry tree in a coastal location of South Australia. It’s canopy would spread around 6 metres and I estimate it’s approx 100 years old. It always provides an abundance of fruit without much care from me. This year I’ve noticed half the crop (especially the more exposed areas of tree) appear dried up and almost sunburnt?? Some of the branches are covered in moss and they tend to be more brittle also but this may be an unrelated matter. Not sure if it’s a fungal disease I read about called popcorn disease. Would it be beneficial to gently remove the dried/dead leaves and fruit? Given the tree is fruiting I imagine this may encourage a better yield? Any tips would be appreciated!