I live in Downstate New York and have two skyrockets on either side of a flower bed.  They were 4-5 ft trees when planted 4 years ago and have been doing really well.  Each Spring, I get several brown tips but the trees recover and grow nicely.  They are now approximately 8-10 feet tall.  Attached are 2 images displaying a rust of some sort on the branches.  I also enclosed an image of the lower part of one of trees indicating some brown tips.  I have read about the cedar apple rust but these trees are not near other apple trees.  Any thoughts if this is normal for Springtime or indicative of a blight.  Thank you.