In the latest version 2020.11.28 13:18 of ConTeXt LMTX, combinations don't seem to work as expected. Example:

\starttext

\startcombination[2*1]
  {first}{a}
  {second}{b}
\stopcombination
\blank[big]
\startcombination[1*2]
  {first}{a}
  {second}{b}
\stopcombination
\stoptext

The output is

The layout argument [2*1] or [1*2] does not seem to have an effect and the caption placement for "b" is strange.

Am I doing something wrong?

Cheers,

Christoph