The below snippet from manual about columnset do not work as expected in luametatex version 2025-02-07, but works in luatex. In luametatex, all the figures gathered at the last few pages.

\usemodule[visual]
\dontcomplain
\useMPlibrary[dum]
\definecolumnset[example][n=4]
\starttext
\startcolumnset[example]
\placefigure[btlr]{brlr}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[btlr]{brlr}{\externalfigure[fake][width=2\textwidth,lines=3]}
\placefigure[btrl]{btrl}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[btrl]{btrl}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[tblr]{tblr}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[tblr]{tblr}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[tbrl]{tbrl}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[tbrl]{tbrl}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[lrbt]{lrbt}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[lrbt]{lrbt}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[lrtb]{lrtb}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[lrtb]{lrtb}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[rlbt]{rlbt}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[rlbt]{rlbt}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[rltb]{rltb}{\externalfigure[fake][width=\textwidth,lines=3]}
\placefigure[rltb]{rltb}{\externalfigure[fake][width=\textwidth,lines=3]}
\dorecurse{100}{sadfdsf asfdasf sfsdf sdfgsd fsdf sdfsdf\par}
\stopcolumnset
\stoptext