Après la mise à jour vers 2.8.0.beta8, plus rien n'apparaît comme "lu"

[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.