You're likely seeing this issue because the number of case notes on the person's record exceeds the system's maximum parameter limit in Wildfly. This prevents multiple case notes from being printed at once.
For hosted customers, please raise a new case and reference this article. We'll increase the max parameters setting for you.
For non-hosted customers, follow the steps in the Change the Max Parameters setting section in the latest version of the Platform Build Guide. We haven’t included the steps here, so you're always working from the most up-to-date guidance.