[NTG-context] Color problem

Consider the following example: \define \HighlightColor {red} \definehighlight[RED][color=\HighlightColor] \definelabel[AA][alternative=inright,headcolor=\HighlightColor,text=] \definelabel[BB][alternative=inright,headcolor=red,text=] \noheaderandfooterlines \starttext \hsize3cm Is the label red?\AA Is the label red?\BB \RED{Is this line red?} \stoptext When run with --luatex, I get the colors I expect, as: When run as lmtx, I get this: All test were run with ConTeXt  ver: 2021.05.20 11:08 MKIV  fmt: 2021.5.20. This worked very well for a long time, then became a problem a while ago, then it resolved, and once more it is a problem. -- Rik