The Portal template in Tumba de corredor en cuña is placed next to a list of links.
When the template is selected in Visual Editor, the selection also includes the links below the template ("Arquitectura prehistórica", "megalitismo", etc.) as if they were part of the template:
The wikitext version for that fragment is:
{{Portal|Prehistoria}}
* [[Arquitectura prehistórica]]
* [[Megalitismo]]
* [[Anexo:Glosario de arquitectura prehistórica|Glosario de arquitectura prehistórica]]
* [[Arqueoastronomía]]This makes it hard to edit such links in Visual editor, and may affect other tools based on it such as content translation (T216812).