Reports of Examination are a valuable tool for assessing vendor performance. However, it's important to recognize that not all issues may impact your product or service. My first recommendation is to evaluate the noted issues to determine if they affect your product or service. If they do, further review whether these issues are open or closed. If closed, assess whether the implemented controls were adequate. If the regulatory body closed them, you can be confident that they were reviewed and the controls were deemed satisfactory.
Additionally, onsite or virtual remote assessments can be beneficial. Engaging in discussions with the third party, along with your core team and other stakeholders such as InfoSec, can help you understand the issues and ensure remediation to your satisfaction. Given that this vendor is already highly rated, you likely have higher visibility on performance and screening (OFAC, reputational, financial screening, etc.).
You can also outline the issues in the vendor relationship and start tracking them for closure. This may assist with future renewal negotiations with the third party. Since this is an ECRA, it is likely quite serious, and the vendor is already working on it. Monitoring and waiting for details on closure is advisable. Alternatively, you may consider working on contingencies and backups in case the vendor's service deteriorates or if you need to change providers. This approach can enhance resiliency moving forward.