footnotes in informaltable, db5

<td>X<footnote><para>Monday, Wed, Fri only</para></footnote> </td>

within an informaltable.
html output
The footnoteref is there, superscripted. The reference is to the content

<sup>[<a name="d0e3227" href="#ftn.d0e3227" class="footnote">2</a>]</sup>

But there is no actual footnote?

Am I missing something please?


TIA DaveP