Removing inline format wrapped around table in table breaks table

[Oliver Pulges]

If content has

<b>
  <table>
    <tr>
      <td>test</td>
      <td>test</td>
    </tr>
  </table>
</b>

then removing the bold inside the table anywhere will break the table.
Technically it is a bit of a hassle to solve, as in html parents can not be temporarily cancelled

[EnnoKirsimae]

One scenario where a table gets wrapped in the given manner, is when the content is pasted from Excel.