He estado rastreando al culpable: discourse-policy, como sugirió @Vraag. A diferencia de lo que dice @Vraag, el plugin afecta al tema que “desaparece” incluso cuando está desactivado: el hecho de que esté en la lista de plugins es suficiente para que el tema “desaparezca” cuando no hay sesión iniciada.
La primera respuesta que utiliza el plugin Policy es esta: Exploring community-based social media - #2 by system - Share - petites singularités
El Markdown de ese mensaje:
[policy group=trust_level_1 reminder=daily]
No utilizamos cookies de terceros.
[/policy]
Aquí está el registro de errores:
TypeError: p es null
Url: https://ps.zoethical.org/assets/plugins/discourse-policy-60b8413b741df408ff16f757f644f9de7cb64099d24c33dc3d85ef735478d72a.js
Línea: 1
Columna: 3373
Ubicación de la ventana: https://ps.zoethical.org/t/welcome-to-p-s/8
Y aquí está el rastreo de la pila:
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Tenga en cuenta que plugin.rb carga un montón de dependencias incluso antes de hacer cualquier cosa. Quizás el error provenga de una de estas dependencias que espera un usuario con sesión iniciada.