Posting the code could also help, as we may be able to see what is causing the issue. :smile:
My guess, based on the description, is that the reference to the label isn't correct and so its not updating the label(s) you are expecting. I would try something like print("Label 1 name: ", label_node_here.name)
and see if the name(s) printed match the names of the labels you are wanting to change.