Hi @Adrien,
we set the .tag class, under some conditions.
But, the issue, as far as I see, is that there are repeated image styles, right?
So, this one:
Or this one, which is the same issue: DUPLICATE: .tag on images again - wasnt happening recently, now it's back
You can try to switch to inline CSS styles if it will solve it or you will have to create a bit more specific selector.
Matej