I'm searching for "paradoxes" in classical modal logics, meaning lines of reasoning which give a counterintuitive conclusion if performed in classical logic, which can be modelled by the (semantical) possible worlds characterization of classical modal logic via Kripke-structures. Especially, a paradox of epistemic nature which relies on vagueness of accessibility of worlds is interesting for me.
While searching for epistemic and classical logic "paradoxes" on e.g. here or here and various other resources, no such example came up. Is there a common type of argument in the literature which I am not finding.