Chord symbol invisible after importing due to style file read failure
As of MuseScore 3.6.0, importing a MusicXML harmony results in a fretboard, but the associated chord is invisible. The chord is actually imported and shown correctly after saving in MuseScore format and opening again.
Example: see testfile mtest/musicxml/io/testChordDiagrams1. For the chord in measure 2, the debugger shows the chord is present but width/height are 1.00/2.63, which was 26.30/41.39 in 3.5.1.