No hay miniatura para vídeos de Vimeo no listados

[merefield (Robert)]

Prueba a usar el plugin complementario de vistas previas de la lista de temas. Permite forzar la recreación de miniaturas al reconstruir:

Topic List Previews (TLP)

This is a Theme Component but has the option to add a complementary plugin. Summary The original Topic Preview component that allows you to add images and excerpts (and more!) to the Topic List whilst being able to configure what additions appear on what list. Repository Link GitHub - merefield/discourse-tc-topic-list-previews: Enriches the content and layout of topic lists Install Guide Installing a theme or theme component …

Podría ayudar.