A second French revolution is ASB, at least with a PoD after the restoration. Louis XVII, ' the miracle child', was beloved by all his subjects, and even die-hard republicans admitted that the Constitution he midwifed and signed met the ideal of the Republic while serving as a shield against its demagogic excesses while he was a symbol of continuity and safety for all clerical reactionists. He was the perfect merging of a monarchist line with a republican upbriging
In order to get a second French revolution, you need to avoid him becoming crowned. Maybe kill him as a child before the revolution. That would kill all the direct line bourbons, as his uncles went to the guillotine, so the crown may fall to Orleans. Now that could indeed lead to a second revolution very quickly, given his blood-thirsty madness (A good thing the brood of Children Louis XVII had made sure he went further and further from the throne)