Multiline equations on Forem

Are multiline equations on Forem broken or am I missing something?

When I enter something like

[ %katex ]
\delta_{ij} = \begin{cases}
1, i = j \\ 
0, i \ne j 
\end{cases}
[ %endkatex ]

I expect this look:

\delta_{ij} = \begin{cases} 1, i = j \\ 0, i \ne j \end{cases}

But I get everything in one line, like this:

\delta_{ij} = \begin{cases} 1, i = j \ 0, i \ne j \end{cases}