Chord Symbol H?
I'm using v3.6.2 and searched for this problem in v3 handbook but didn't find a match. I transposed the key from a contributed lead sheet at https://musescore.com/user/6375061/scores/5418719 which uses 3 chords: Am7 Em7 G. When I transposed to one-sharp, chords became Em7 Hm7 D. As if note "H" followed "A"? I tried manual edit to fix chord symbol but it auto-changed itself to Bbm. Thanks for any advice.