Which captain jacks product are you using? “Spraying”
I ask because there are at least two disease formulas I can think of.
If neem max it’s gotta be around 2.5 ounces to the gallon for fungus and diseases control. It works well though.
There are other things you could try but that is what I would try to knock it out.
Also I’m sure you know spray it when the temps are at their coolest and do it in the dark. Neem will burn and it will absorb better with temps closer to the 70’a range.
Same goes with foliar feedings.
Be aware that touching will spread it especially if the foliage or your hands are wet.
I typically treat the leaves with neem once top and bottom. Under the leaves just as important as top of leaves. Good stem drench wouldn’t hurt either.
Spray the ground under the plant well.
Then I carefully remove the affected leaves at a later time. Bio security is key with spreading spores and infecting any type of plant.
Avoid any top watering. Just water the ground and try to avoid splashing. You got spores splashing up off the ground that started it in the first place.
Rain will spread it if the leaves aren’t properly protected.