No. Actually the philosophy is quite clear. The man who coined the term and was the first libertarian was a revolutionary in the French Revolution. The problem is so many people apply the noun to things that clash with the ideology.
Libertarians are not libertarian. Ideologically Libertarians often tend to be fascistic. But are so hyper self-centered. They do not buy into and will not participate in embracing any group identity.
I wish people stayed true to the original definition of words. Politics would be much easier to navigate. But alas who doesn’t do social manipulation these days: We are freedom fighters except we hate lgbt and are pro Catholicism and some even want return of monarchy vote for us!
The definition hasn’t changed. Soviet Russia a Marxist leninist Nation had a party called the Communist party. They were not communist. At least not outside of aspirationally. They were still Marxist leninist. But they rely on people easily being confused between nouns and adjectives
Effectively it changes because we live in post truth society. It doesn’t matter anymore what was the original meaning of the word except to some few nerds that no one listens to anyway. That have phd in politics or something equally useless and cringe.