Hi @rjessome & @juan.grau,
This was a failure on my part to communicate the discussion I had with the Product team, my apologies.
This is not something that will be re-implemented as it goes against the recommended workflow of using Slices described here.
What will happen is that is that we will properly deprecate it by removing labels from being selectable when an image is highlighted as this causes confusion and gives the impression that labels can be applied, though as you’ve seen they cannot.
Let me know if you have any further questions.
Thanks.