Explain the problem.
If a table has a caption in the input, the rst writer with --list-tables=true generates a unecassary additional table, which leads to two captions.

current output:

.. table:: Table 1 — Terminology

   .. list-table:: Table 1 — Terminology

expected output:

.. list-table:: Table 1 — Terminology

Issue in the source code:
The current rst writer is adding always an additional table rst directive if a table caption is been set.
In case we create a list-table we should not do this, as the list-table directive gives the opportunity to set a caption by itself.
See

Pandoc version?
3.4