Known issue in 4.6. https://bugzilla.redhat.com/show_bug.cgi?id=1964532

Description:
When the kibana pods were restarted. the non-kubeadmin user can see their index. the kibana pattern throw message "Saved object is missing,Could not locate that index-pattern (id: 1a3361e0-db25-11eb-b9f7-7f39251b1356),

Version:
elasticsearch-operator.5.1.0-74

Step to reproduce:
1) deploy Logging 5.1
2) no-kubeadmin user create index pattern using UI
3) restart Kibana pods
4) Login kibana UI again.

Actual Result:
The UI throw error 'Saved object is missing,Could not locate that index-pattern (id: 1a3361e0-db25-11eb-b9f7-7f39251b1356' which click the index pattern name.

Expected Result:
users can discover logs via index pattern.

Additional info:
The workaround is to delete the .kibana indics and create pattern in UI again.