If it is bugs what do you think it is. I don't use any foliar sprays just feed once a week and water once a week
TBH I couldn't tell you, what type of bug it is.
But if it isn't splash damage etc. In my experience it could only be bugs or disease. It's more likely to be a bug before disease.
We might live on separate sides of the world too. Pests that thrive where, we are, may be different. Most bug damage looks very similar.
Try to find a bug, especially underneath the leaves, on the stem, in the soil etc.
It may be worth, just giving them a preventative / irritant like neem oil.
Or something, generally devastating for bugs like spinosad. Which is quite safe for, humans and most household pets.