You're correct. NPR has reported some deaths in vaccinated people in this article. https://www.npr.org/sections/health-shots/2021/04/13/9864114...

>So far, more than 74 million people have gotten fully vaccinated in the United States. It's unclear how many have later gotten infected with the coronavirus anyway. But Michigan, Washington and other states have reported hundreds of cases. Most people have gotten only mildly ill, but some have gotten very sick. Some have even died.