LiveUpdate starts immediately after SEP service starts, and the execution is recorded in SISIDSEvents.csv or ICDm's activity history, however there is no record of it in lux.log.
SEP LINUX Agent 14.3 RU8
LiveUpdate is not actually running, hence no record in lux.log.
The records in SISIDSEvents.csv and SAEPRTEvents.csv are incorrect and misleading.
This issue is fixed in 14.3 RU9, LiveUpdate launches after the Linux Agent service starts, but the event is not logged in Lux.log