[NTG-context] \doifemptyelse issue?

The following MWE gives "false false" instead of "false true". I'm sure this used to work (18 months or more ago!) as I found it when re-processing an old document. ---start--- \setdataset [DS] [a=aaaa] \setdataset [DS] [a=] \starttext :\datasetvariable{DS}{1}{a}: \crlf :\datasetvariable{DS}{2}{a}: \crlf \doifemptyelse{\datasetvariable{DS}{1}{a}}{true}{false} \doifemptyelse{\datasetvariable{DS}{2}{a}}{true}{false} \stoptext ---end--- ConTeXt ver: 2023.09.26 18:19 LMTX There is a work-around using \doiftext instead as that seems to work okay with recalled dataset values but I thought I'd raise it. — Bruce Horrocks Hampshire, UK