This incident has been resolved.
We have implemented a fix to address the missing Monitoring Points and all application nodes have had this change applied. All Monitoring Points display as expected.
AppNeta has identified a workaround for this issue and will be applying it in stages across the next little while. We will post an update here.
AppNeta Engineering is continuing to investigate and can confirm that quantities of affected Monitoring Points on each application node ranges from very small to large.
AppNeta Engineering has identified an issue affecting all application nodes, whereby some Monitoring Points do not display in the Managed Monitoring Point Page. Affected Monitoring Points are still connected and returning data, and alerting functionality is unaffected. We are investigating this issue and will post an update here shortly.