LaTeX quirk?

[German Rodriguez]

Trying \ref{mylabel}, which previews fine but appears to have turned to ??? when posting. It works if you use CODE tags

\ref{mylabel}

I wonder if it works when we escape the backslash \\ref{mylabel}?

[Maarten Buis]

<a href="https://en.wikipedia.org/wiki/XY_problem">xy-problem</a>