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