The root cause of this issue is a missing 'parent_path' field for entries in the following tables. Since the introduction of a secondary index on the 'parent_path' field in version 9.1.0, child lookups now rely on this field; consequently, any objects missing 'parent_path' are excluded from the list API response:
ProviderInterface
PolicyEdgeCluster
PolicyNatRules
PolicyTransportZone
LocaleService
StaticRoutes
PolicyDnsForwarder
Nat
- Group