At least the low lunar orbit is usually unstable due to Moon being chunky: https://en.wikipedia.org/wiki/Mass_concentration_(astronomy)#Effect_of_lunar_mascons

At least the low lunar orbit is usually unstable due to Moon being chunky: https://en.wikipedia.org/wiki/Mass_concentration_(astronomy)#Effect_of_lunar_mascons_on_satellite_orbits https://en.wikipedia.org/wiki/Mass_concentration_(astronomy)... But there are exception & Lagrange points should be generally safe.