The OES 2018 SP3: Release Notes documents issues that Micro Focus plans to address in a future release.
If you plan to upgrade your OES server to OES 2018 SP3 in text mode, before starting the upgrade process, you must change the default runlevel to runlevel 3 in the/etc/inittab file. If you fail to do this, you might not be able to continue the upgrade process and complete it at later stages.