Changing property "Ottava brackets"

[Mathias Vogel]

I use "\set Staff.ottavationMarkups = #ottavation-ordinals" to add "va" or "vb" 
to the octavation numbers as in the old notation. However, this only works for 
octavation up ("\ottava #1"), octavation down ("\ottava #-1") erroneously 
outputs an "8va" or "15ma", instead of "8vb" or "15mb". With the option 
"#ottavation-simple-ordinals" this works fine, but not with 
"#ottavation-ordinals". Can you help me here? Thank you.

Lilypond-Version: 2.22.2