Well I think we can agree that it is:
1) Rose Gall
3) and the rose is not going to die today or have to be ripped out such as with rose rosette disease
So it is a good day! I only provided the article (did not write it) to show that it was not life threatening to the rose, whether the leaves or cane are affected...And those little insects can be fascinating based on the ending of the article.
Edited to say (whether the leaves or cane are affected)
May everyone be blessed with a good day!