Ok I see issues with your DBagent and ISync.
Here is a sniplet of your logs:
LTAgent v120.385 - 8/12/2018 1:00:59 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 1:00:59 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 1 Interval = 8:::
LTAgent v120.385 - 8/12/2018 2:05:25 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 2:05:25 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 2 Interval = 8:::
LTAgent v120.385 - 8/12/2018 4:02:57 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 4:02:57 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 4 Interval = 8:::
LTAgent v120.385 - 8/12/2018 7:05:16 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 7:05:16 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 7 Interval = 8:::
LTAgent v120.385 - 8/12/2018 8:01:14 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 8:01:14 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 8 Interval = 8:::
LTAgent v120.385 - 8/12/2018 8:01:14 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Maintenance Script Starting:::
LTAgent v120.385 - 8/12/2018 8:01:14 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Maintenance Script Starting:::
LTAgent v120.385 - 8/12/2018 8:01:15 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Maintenance cleaning up stail records:::
LTAgent v120.385 - 8/12/2018 11:05:03 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 11:05:03 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 11 Interval = 8:::
LTAgent v120.385 - 8/12/2018 12:02:58 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 12:02:58 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 12 Interval = 8:::
LTAgent v120.385 - 8/12/2018 4:00:55 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 4:00:55 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 16 Interval = 8:::
LTAgent v120.385 - 8/12/2018 4:00:56 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Maintenance Script Starting:::
LTAgent v120.385 - 8/12/2018 4:00:56 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Maintenance Script Starting:::
LTAgent v120.385 - 8/12/2018 4:00:56 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Maintenance cleaning up stail records:::
LTAgent v120.385 - 8/12/2018 5:01:39 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 5:01:39 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 17 Interval = 8:::
LTAgent v120.385 - 8/12/2018 6:01:21 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 6:01:21 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 18 Interval = 8:::
LTAgent v120.385 - 8/12/2018 7:02:49 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 7:02:49 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 19 Interval = 8:::
LTAgent v120.385 - 8/12/2018 8:03:38 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 8:03:38 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 20 Interval = 8:::
LTAgent v120.385 - 8/12/2018 9:03:34 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 9:03:34 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 21 Interval = 8:::
LTAgent v120.385 - 8/12/2018 10:04:50 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Scanner thread starting:::
LTAgent v120.385 - 8/12/2018 10:04:50 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 22 Interval = 8:::
On August 12th the probes ran twice once at 8:am and again at 4:pm. It shows what the run hour was and what the probe scan rate is set to.
LTAgent v120.385 - 8/12/2018 12:02:58 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 12 Interval = 8:::
See -> HOUR = 12 Interval = 8 which means the current time is 12PM and we are set to probe every 8 hours.
This shows when we are probing.
TAgent v120.385 - 8/12/2018 8:01:14 AM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor Maintenance Script Starting:::
Since we are set to probe every 8 hours starting at midnight that would be 00:00 hours, 08:00 hours(8:00am), 16:00 hours (4:00pm)
Now look at the full log, The dbagent "should" be firing off ISync every 6 minutes and relaunching at exactly the top of every hour. You should see the following for every hour of the day every day
LTAgent v120.385 - 8/12/2018 4:00:55 PM - Plugin VMWareESXHealthMonitor, Version=4.0.0.57, Culture=neutral, PublicKeyToken=null: P4L ESX HealthMonitor info HOUR = 16 Interval = 8:::
So starting at midnight going to midnight you should see 24 entries lik so where "HOUR" = the hour it ran (0-23) and you are missing hours all throughout the logs.
So your problem is that setting the interval to 8 and ISync skipping anywhere from 1 to 12 hours a day will cause gaps in probes as ISync is skipping the "Hour" the probe should be running.
So I would start looking at all the logs for all plugins being used there. See if there is any consistency between logs and missing hours.
See if multiple logs all have the same time missing, if so then you may have a LThost issue bigger than the plugin that is showing up in the plugin.
Mean while changing probe times making that a smaller number should allow more chances per day that the probe will fall on a hour that is working as it should.