Inspect element reveals <span class="math"> … </span>. Can someone point me in the right direction how to fix this please ? (Assuming the solution is similar to the above-linked post)

When inspecting the source code, I saw formulas are rendered in <span class="math-container inline-math mathjax-math"> ... </span> but in the polls, formulas are rendered in <span class="math"> ... </span>. If I test it in safe mode (with plugins disabled) all formulas are rendered in <span class="math"> ... </span>. Which makes me think the math plugin doesn’t work with the poll plugin.

As an alternative, you could put your formulas outside the poll, and then reference them in the poll like so: