Guitar setup isn't correct. Either the neck has bent, or intonation (free length of a string) is wrong. Usually wrong intonation doesn't affect that much as you described on lower frets. My bet is neck.
Guitar setup isn't correct. Either the neck has bent, or intonation (free length of a string) is wrong. Usually wrong intonation doesn't affect that much as you described on lower frets. My bet is neck.