/ost/ - Music, Composing

My Epiphone Les Paul sounds like shit whenever I play an F chord on it. Almost like a muted sitar. I've been playing for years and never had this happen before. It sounds fine when I play the chord on other guitars, both acoustic and electric. I even tried playing on another Epiphone Les Paul and it sounded fine. It's only on this one guitar. I already tried changing the strings and it's still happening.