Leave. Job-hopping is a pattern, not a single event. If I get a candidate with a good track record but one three-month stint, sure I'll query it, but "it wasn't a good fit for me" is a reasonable excuse and a good conversation starter if you can wrap it in a strong story for what _is_ a good fit.
Bait & switch jobs are a pattern, they happen all the time. Needing to leave several jobs in a row after only a few months at each place is just basic reality, normal circumstances for a lot of people given the way corporations treat employees now.
