Após atualizar para 2.8.0.beta8, nada mais aparece como "lido"

[Falco]

It’s already a know issue at Topic List Previews (legacy) - #1558 by raghukamath @gigperformer.

@gigperformer

Is there a way to downgrade so we can go back to the previous version?

No, there is no support for downgrade.