RBAC Access and scope tags not showing the correct amount of devices within the device list?

Hi,

Is anyone else experiencing issues with the RBAC/Scope Tags within Intune?

For example, A Department manager has access to HR devices within Intune and should see 60 Windows devices within the devices section, but can only see 25 devices declining slowly over time randomly until it plateaus to having only a few devices left. However global administrators can see all 60 devices when filtering the device category to HR.

No configuration changes were made and this is happening across all departments.