Planes have been dissapearing throughout history, although it isn't common.
@arunforce has a point, air france 447 vanished, was all over the news, and then was later found in the ocean.
You would think that us humans would have knowledge of our own aircrafts, since we landed on mars. But nope, guess we didn't figure that one out yet.
https://time.com/18358/malaysia-airli...isappearances/