No volta printed at the beginning

[Nicolas Sceaux]

If that's not a bug, I would be interested in knowing how to make it appear:

\version "2.3.22"
\header {
    texidoc="The volta bracket is not printed when the manual repeat
command is at the beginning of the score:
-->  warning: No volta spanner to end"
}

\layout { raggedright = ##t }

{
    \set Score . repeatCommands = #'((volta "1."))
    c'1
    \set Score . repeatCommands = #'((volta #f))
    c'1
}


nicolas