Hi I am using Umbraco v 7.7.7 and have a separate API site which can access my Umbraco content and for OAuth Access

I have noticed on the API site in the logs recently that the Application keeps crashing with the following errors, I am using Shannons Ouath Implementation.

the log file right before the crash is always related to the scheduled Tasks is the following, any help appreciated:

2018-07-11 22:14:44,628 [P7616/D2/T136] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [ScheduledTasks] Terminating
 2018-07-11 22:14:44,628 [P7616/D2/T136] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [ScheduledTasks] Waiting for tasks to complete
 2018-07-11 22:14:44,628 [P7616/D2/T136] INFO  Umbraco.Core.MainDom - Stopping...
 2018-07-11 22:14:44,628 [P7616/D2/T136] INFO  Umbraco.Core.MainDom - Released MainDom.
 2018-07-11 22:14:44,628 [P7616/D2/T136] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [ScheduledPublishing] Terminating
 2018-07-11 22:14:44,628 [P7616/D2/T136] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [ScheduledPublishing] Waiting for tasks to complete
 2018-07-11 22:14:44,628 [P7616/D2/T136] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [HealthCheckNotifier] Terminating
 2018-07-11 22:14:44,628 [P7616/D2/T136] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [HealthCheckNotifier] Waiting for tasks to complete
 2018-07-11 22:14:44,628 [P7616/D2/T136] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [HealthCheckNotifier] Tasks completed, terminated
 2018-07-11 22:14:44,628 [P7616/D2/T136] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [KeepAlive] Terminating
 2018-07-11 22:14:44,628 [P7616/D2/T156] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [ScheduledPublishing] Tasks completed, terminated
 2018-07-11 22:14:44,628 [P7616/D2/T136] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [KeepAlive] Waiting for tasks to complete
 2018-07-11 22:14:44,628 [P7616/D2/T136] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [LogScrubber] Terminating
 2018-07-11 22:14:44,628 [P7616/D2/T156] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [KeepAlive] Tasks completed, terminated
 2018-07-11 22:14:44,628 [P7616/D2/T139] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [ScheduledTasks] Tasks completed, terminated
 2018-07-11 22:14:44,628 [P7616/D2/T136] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [LogScrubber] Waiting for tasks to complete
 2018-07-11 22:14:44,628 [P7616/D2/T154] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [LogScrubber] Tasks completed, terminated
 2018-07-11 22:14:44,644 [P7616/D2/T136] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [Umbraco.Web.Scheduling.IBackgroundTask] Terminating
 2018-07-11 22:14:44,644 [P7616/D2/T136] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [Umbraco.Web.Scheduling.IBackgroundTask] Waiting for tasks to complete
 2018-07-11 22:14:44,644 [P7616/D2/T156] INFO  Umbraco.Web.Scheduling.BackgroundTaskRunner - [Umbraco.Web.Scheduling.IBackgroundTask] Tasks completed, terminated
 2018-07-11 22:15:14,657 [P7616/D2/T154] INFO  Umbraco.Core.UmbracoApplicationBase - Application shutdown. Details: HostingEnvironment

_shutDownMessage=HostingEnvironment initiated shutdown
HostingEnvironment caused shutdown

_shutDownStack=   at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)
   at System.Environment.get_StackTrace()
   at System.Web.Hosting.HostingEnvironment.InitiateShutdownInternal()
   at System.Web.Hosting.HostingEnvironment.InitiateShutdownWithoutDemand()
   at System.Web.Hosting.PipelineRuntime.StopProcessing()