xymatrix upright arrow breaks labeling

Question

When I try to compile the following diagram

\xymatrix
{
A\ar[r]^{g}{\ar[d]_j} & B\ar[d]^{e}\\
X\ar[r]_{f} \ar[ur]^{\tilde g}& Y
}

the subscripts of the arrow labels are treated as the subscripts of A and X, but if I take out the diagonal arrow it compiles normally

\xymatrix
{
A\ar[r]^{g}{\ar[d]_j} & B\ar[d]^{e}\\
X\ar[r]_{f} & Y
}

Is this just me or a bug? How do I fix it?

Edit: here are pics of the compiled diagrams

no diagonal

diagonal

Edit 2: I just tried compiling the same thing in my Texclipse setup but it actually comes out the same way. So it's not an Anki problem.

Answer 1

Please provide an MWE as your problem is not reproducible for us. Your snippet works just fine as I am showing below. However, I provide a transcript to tikz-cd which is much more modern and maybe interesting for you.

% arara: pdflatex

\documentclass{article} 
\usepackage[all,cmtip]{xy}
\usepackage{tikz-cd}

\begin{document} 
\[\xymatrix{%
    A\ar[r]^{g}\ar[d]_j & B\ar[d]^{e}\\
    X\ar[r]_{f} \ar[ur]^{\tilde g} & Y
}\]
\[\begin{tikzcd}
    A\ar{r}{g}\ar{d}[swap]{j} & B\ar{d}{e} \\
    X\ar{r}[swap]{f}\ar{ur}{\tilde{g}} & Y
\end{tikzcd}\]
\end{document}