In the sitecron job - Site smart publish I enabled the job and have the job scheduled to run daily.

But if I try to execute the job manually anytime then I do a Execute Sitecron job now which runs the job in the background and I can see it updates in the log file with the actual date time stamp of when it was run.

But why the LastRunUTC variable is not getting updated with the current date and time when it was manually executed?