asciidoctor-pdf: Call out number inside code block replaced by `not` glyph

Hello, I’m struggling to render conum inside coderay code blocks. I read almost every glyph issues I could find in this repo but I’m still missing something

As you can see conum are ok outside code blocks but not inside.

Using

<asciidoctorj.pdf.version>1.5.0-alpha.16</asciidoctorj.pdf.version>
<asciidoctorj.version>1.5.6</asciidoctorj.version>
<jruby.version>9.1.8.0</jruby.version>

And my theme with arial ttf extracted from a Win10 install:

font:
  catalog:
    Arial:
      normal: arial.ttf
      bold: arialbd.ttf
      italic: ariali.ttf
      bold_italic: arialbi.ttf
    # Noto Serif supports Latin, Latin-1 Supplement, Latin Extended-A, Greek, Cyrillic, Vietnamese & an assortment of symbols
    Noto Serif:
      normal: notoserif-regular-subset.ttf
      ...skipped...
    # M+ 1mn supports ASCII and the circled numbers used for conums
    M+ 1mn:
      normal: mplus1mn-regular-ascii-conums.ttf
      ...skipped...
    # M+ 1p supports Latin, Latin-1 Supplement, Latin Extended, Greek, Cyrillic, Vietnamese, Japanese & an assortment of symbols
    # It also provides arrows for ->, <-, => and <= replacements in case these glyphs are missing from font
    M+ 1p Fallback:
      normal: mplus1p-regular-fallback.ttf
     ...skipped...
  fallbacks:
    - M+ 1mn
    - M+ 1p Fallback

conum:
  font_family: M+ 1mn
literal:
  font_family: M+ 1mn
base:
  font_family: Arial

Thanks for your help