Re: in tab, stems randomly cross or avoid note numbers in chords when avoid-note-head is false

> As per the attached .ly and resulting image, in tabulature, stems
> randomly cross or avoid numbers representing notes in chords when
> avoid-note-head is false.  [...]

Indeed, and thanks for the report!  I've checked with version 2.19.22
and I get the same, random behaviour – but slightly different.  It
looks like you've unveiled an ancient bug.

> In my opinion, the stems should be "hidden" behind the numbers. 

Please file an issue at 

  https://gitlab.com/lilypond/lilypond/-/issues


    Werner