Why Painting Over Bathroom Surface Mold Won't Fix the Problem
https://thecleancorner.lumenforgex.com/posts/why-painting-over-bathroom-surface-mold-won-t-fix-the-problem
Just painting over bathroom mold is like putting a bandage on a broken pipe; it hides the ugly stain for a while, but the moisture problem is still there feeding the mold behind the new paint, which will eventually bubble up and come back through. You've got to tackle the root cause, like fixing leaks or improving ventilation, or you'll be repainting the same spot every few months.