Sql Developer 18.4 - Snapshots View only shows snaps whose SnapID is less then 10000

Hi,

Snapshot view from dba->Performances->Snapshots in SQL Developer 18.4 doesn't show snapshots entries whose snapid is greater than 9999. Is it a bug or is there a setting to limit the number of visibile snap entries in Snapshots view? Below a screenshot where you can see how the TreeView under DBA->Performances->Snapshots correcty shows greater than 9999 SnapIDs (the view is filtered by "Most Recent 10") but the corresponding view only shows snaps with snapid less than 10000.

the Image is available at https://imgur.com/a/QHCRhj6