[itsme]

I have a chordpro file containing chords in C. It is transposed via transpose function to A, 3 semitones down.
When I open it in the new Text Editor, it shows chords in C as written in the file - OK so far.
When I tap "Transpose" in Text Editor, the transpose window shows "F#" (3 semitones down from A), I would expect it to be intialized with "A" like in the original, three semitones down from the displayed "C" chords.
I close the transpose window with "Cancel" and the editor window shows chords in A instead of discarding everything and keeping the "C" chords.
"Transpose" again, the transpose window shows "D#", another three semitones down.
What's going on here?