I have been battling against this problem days and nights.
As the screenshots suggest,
I have set the time zone of all above fields exactly the same,
and then what I found is,
I have to emphasize the till time and total time left are showing because I re-built the log and/or clear the log.
Otherwise, all will be showing only Unknown.
I believe this is a bug obviously, so hoping mikrotik can get this fix a.s.a.p.