That does look a lot like they have a beetle called Raspberry Cane Borer attacking. This pest is relatively easy to control by pruning out the affected canes below the girdle. If the infestation is severe, insecticide sprays can be used, but it is too late this year to use that approach because it targets the adults and would have needed to happen before bloom. You can read a more detailed description of how to mange the pest in this article from MSU Extension: https://www.canr.msu.edu/news/controlling_raspberry_cane_borer