Yes, I've lost a few over the years, but it was typically just a one-time discovery on a given, typically brand-new crankset.

Once I discovered the loose or missing bolts, re-torquing solved the problem. I've since solved it and most other new bike / component problems by never assuming that bolts were originally torqued correctly, using assembly paste on carbon bits, and using Loctite 242 on any bolts that can typically be the source of creaks and squeaks.