OUD11g - ODSM / OUDSM Hangs on Data Browser Tab (Doc ID 2249520.1)

Reviewing the messages in AdminServer.log file, 11g snippet:

[20/Mar/2017:18:11:08 +0000] SEARCH REQ <.....> op=296 msgID=297 base="" scope=one filter="(|(objectclass=subentry)(objectclass=ldapsubentry))" attrs="dn,objectclass"
[20/Mar/2017:18:13:10 +0000] SEARCH RES <.....> op=296 msgID=297 result=0 nentries=0 etime=122776
[20/Mar/2017:18:13:10 +0000] ABANDON REQ <.....> op=297 msgID=298 idToAbandon=297
[20/Mar/2017:18:13:10 +0000] ABANDON RES <.....> op=297 msgID=298 result=119 etime=0

Example from 12c can look like this:

[19/Jun/2022:18:08:59 +0300] SEARCH REQ conn=123 op=269 msgID=270 base="" scope=one filter="(|(objectclass=subentry)(objectclass=ldapsubentry))" attrs="dn,objectclass"
[19/Jun/2022:18:10:44 +0300] SEARCH RES conn=123 op=269 msgID=270 result=0 nentries=0 etime=104710
..
[19/Jun/2022:18:10:44 +0300] SEARCH REQ conn=123 op=272 msgID=273 base="" scope=one filter="(|(objectclass=subentry)(objectclass=ldapsubentry))" attrs="dn,objectclass"
[19/Jun/2022:18:11:05 +0300] SEARCH RES conn=123 op=272 msgID=273 result=0 nentries=0 etime=20740
[19/Jun/2022:18:11:05 +0300] CONNECT conn=171 from=10.0.215.92:44572 to=10.0.215.92:4444 protocol=LDAPS
[19/Jun/2022:18:11:05 +0300] DISCONNECT conn=123 reason="I/O Error"
[19/Jun/2022:18:11:05 +0300] DISCONNECT conn=171 reason="I/O Error"

OUDSM log snippet, also 12c:

<Jun 19, 2022 6:11:05,454 PM AST> <Error> <oracle.idm.directoryservices.odsm.ctrl.oid.OIDDBCtrl> <BEA-000000> <LDAP connection has been closed
oracle.idm.directoryservices.odsm.common.ODSMException: LDAP connection has been closed
at oracle.idm.directoryservices.odsm.server.ServerAccess.getEntry(ServerAccess.java:1401)
at oracle.idm.directoryservices.odsm.server.ServerAccess.getRootEntry(ServerAccess.java:1630)
at oracle.idm.directoryservices.odsm.provider.oid.OIDDBProvider.getRootEntry(OIDDBProvider.java:276)
at oracle.idm.directoryservices.odsm.ctrl.oid.OIDDBCtrl.getEntryTreeTableModel(OIDDBCtrl.java:475)