Referencing equation in align environment with different `&` placement results in bug.

An equation in an align environment with `&=` works when previewing reference. However, if there are weird placements for `&`, we get an error. For example, in this snippet: ```markdown $$ \begin{align} \text{Quadratic Formula}:& x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \label{eq:quadratic-formula} \end{align} $$ ``` This reference: ```markdown We finally use quadratic formula $\eqref{eq:quadratic-formula}$ with the form $ay^2 + by + c = 0$ to solve for $y$: ``` results in the following error: <img width="669" alt="image" src="https://github.com/user-attachments/assets/da01a505-80bc-4093-93a6-0751ec447c30">