With the latest (2022-12-21) LMTX I see a regression in xtables. The following code:

\starttext
\startxtable
  \startxrow
    \startxcell
          This is a line of text.
    \stopxcell
    \startxcell
          \contextversion
    \stopxcell
  \stopxrow
\stopxtable
\stoptext

produces this with 2022-12-09:

and this with 2022-12-21:

The problem appears to be LMTX-specific. (I did not save 2022-12-15 for testing, but did not see the problem with that version.)

--
Rik