Leaf problem

Definitely not fungus. More than likely nutrient burn but it's also in weird places on the leaves so I would do a bug check could be caused by insects

Looks to be the aftermath if nitrogen toxicity to me. If the leaves are getting brittle as well that is part of it. I would not worry to much about it and rein in the nutrients your using like Roberts suggested. Good Luck!

Yup. Your plants are ok. You are defol experiencing nute lockout. Suffering from some def that's what the spots are. But in nute lockout some nutes are taken in excess and some not enough. And usually N always getting too much.

Your leafs are very very green. If you look at my CBD hydro you'll see the same marks on the odd pic. When I included the last 2 fan leafs. That's just part of your leaf dying. Take a leaf off and if it goes to ash in your hands u have N tox. I'll look through ur diary but even without doing so I can tell that pic was taken with a flash on a cam or natural day light. Led lights can be very deceiving with the color of your leafs. Happy growing if I see anymore I'll drop a comment on DM. Happy growing pal..

Doesn’t appear to be mold- Usually you can take a damp rag of wipe the mold off the leaves. This seems like a bit of leave damage - usually caused by overage/shortage of nutrients or ph fluctuations

The brown spots looks like a little potassium deficiency likely from flowers trying to bulk and develop more. Would go easy on nitrogen if you can.