I catched various floating flowers since the event started, but I haven't got the achievement Flower Finder: "Find flowers from a random event or floating around the site!"

I'm pretty sure that event is for the Vesnali flowers and not Survival ones.

Thank you, I just saw it's on Vesnali category. Well then, it would be great if Subeta changed the description to add "During Vesnali" or enabled it for Survival to avoid confusion again.

I think it's fair to update the description to say only Vesnali flowers.