Another LMTX/MkIV difference, this time with expansion:

\define\Align{yes}
\starttext
\startalignment[\Align]
    This works with MkIV but fails with LMTX, complaining: {\tt
    tex error on line 3 in file G:/expand.mkvi: The file ended
    when scanning an argument.}
\blank
   It works in both when \tex{def} or \tex{defineexpandable} is
   used instead of \tex{define}.
\blank
   What changed?
\stopalignment
\stoptext

It may well be that I have been abusing some laxity in MkIV and that LMTX is a bit stricter in what it accepts, but I would like to know if this is an expected difference.

--
Rik