Lightroom classic ne filtre plus les photos marquées en mode grille dans une collection. Je souhaite ne voir que les photos filtrées.

See if this workaround to an acknowledged bug with filters helps you:

I am not experiencing this problem (Windows 11 25H2, LrC 15.2). Please tell us the version NUMBER of your operating system and version NUMBER of LrC. We need the version NUMBERs and not words like “latest” or “up-to-date”.

Sometimes resetting your preferences fixes interface problems like this.

The new forum is confusing a lot of people. We don’t need a title the same words as in your text. When it asks for “Briefly describe your problem”, that’s the title, it should be a few words like “Filters not working”.