Close all the PDBs and open and check again
When we query the v$service_event view from within that PDB we get data from all of the pluggables including root. If we do the same query in another PDB we don't get anything back.
The most likely cause for this is the user querying in one PDB has privileges on this view and that user does not have privileges in the other PDB.
You mentioned this is a local user. So even if it has the same username, it is not the same user in both PDBs.