Equation numbering in notebooks is broken. All equation numbers are "(1)". #155888
Description
The source is a notebook with a single cell:
\begin{align}
\mathbf{y} &\sim Binomial( \mathbf{p}, \mathbf{n})\\
\mathbf{p} &= \mathrm{expit}(\mathbf{\theta} + logit(\mathbf{p_1}))\\
\mathbf{\theta} &\sim N(\mu, \sigma^2)\\
\mu &\sim N(\mu_0, S^2)\\
\sigma^2 &\sim InvGamma(0.0005, 0.000005)\\
P(y, \theta, \sigma^2) &= P(\sigma^2) P(\theta|\sigma^2) P(y|\theta)
\end{align}