Job Events from a remote node do not get purged by the online purge.
Cause type: By design
Root Cause: This is by design that the remote events sent from a remote node(s) are not purged locally on the local node.
In order to delete the remote job event on the local node, you can use the command uxdlt evt, as the example below:
uxdlt EVT EXP SES=\" \" UPR=UPROCNAME MU=MUNAME PDATE=* USER=USERNAME