I came across something very strange when importing MusicXML from another product. I cannot get the Singers > Tenor player to render correctly in a bass clef. It renders the line an octave too high. During playback the notes are played in the correct octave, and if I change the clef for that staff to treble-8vb it renders in the correct octave. Attaching a couple of screenshots that illustrate this issue. The only difference between the two screenshots is the clef has been changed.
Can someone explain why this is happening? Seems like a bug.