ConTeXt  ver: 2022.11.14 22:58 LMTX on W11 x64

I have been testing the recently added \autoinsertedspace, and I found an odd failure.

The following compiles with \nbsp commented as shown, but once that line is active, the compilation fails:

lua error:
        callback error: ...MTX/tex/texmf-context/tex/context/base/mkxl/font-hsh.lmt:151: table index is nil

It fails differently in MkIV (but it is nice to see that the new command has been backported):

luatex warning  > node filter: error: ...MTX/tex/texmf-context/tex/context/base/mkiv/node-nut.lua:380: Attempt to a non-existing node


\starttexdefinition unexpanded New
\starttexdefinition doNew #1#2
   \ (#1|–|#2)


  ABC 0\New{123}{456} 789

% \nbsp
  0\New{123}{456} 789


Am I doing something wrong here? \nbsp is needed to prevent improper line breaks.