Something like this worked just fine before the 2025A update (albeit using \NewTableCommand). Accessing these variables rownum, colnum, etc within a NewTblrTableCommand no longer works. Changing those values to constant values works just fine. \thecolcount works, but not rownum, colnum, \therownum, \thecolnum.
\NewTblrTableCommand \tablegroup [1] [c] {
\tblr_set_cell:nnnn {\arabic{rownum}} {\arabic{colnum}} {c=\thecolcount}
{#1,bg=blue,fg=white,font=\bfseries\sffamily}
}
Something like this worked just fine before the 2025A update (albeit using \NewTableCommand). Accessing these variables rownum, colnum, etc within a NewTblrTableCommand no longer works. Changing those values to constant values works just fine. \thecolcount works, but not rownum, colnum, \therownum, \thecolnum.