Dear gang,

The appears to be something wrong with the sidebar and marginrule mechanisms. MWE:

==============

% ConTeXt  ver: 2023.09.26 18:19 LMTX

\setupmarginrule[1][rulecolor=darkred]

\definesidebar[Sidebar][rulethickness=0.28pt,distance=3pt,rulecolor=darkgreen]

\setupsidebar[rulecolor=darkgreen]

\starttext

\startmarginrule[1]

\input ward

\stopmarginrule

\blank

\startsidebar[Sidebar]

\input zapf

\stopsidebar

\stoptext

==============

In the output, either

i)  the rules do not appear at all (most attempts); or

ii) the rules appear for a split-second then disappear (using sumatrapdf as the viewer, so the pdf updates on the fly).

Is is a bug?

A second question: Is either mechanism preferable over the other? That is: In LMTX, what is the best mechanism to use? 

Thank you in advance for any guidance.

Best wishes