We are running the latest version of CMS/Connerce/Find on DXC.

every now and then, the scheduled job configuration page for custom scheduled jobs (those created by us in the site solution) throw an error:

2018-11-14T19:41:27,Error,xylmxylemincf3l7nprod,f3ff76,636778212878672354,0,1832,267,"EPiServer.Global : 1.2.5 Unhandled exception in ASP.NET
System.Web.HttpUnhandledException (0x80004005): Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.ArgumentException: The job identifier cannot be empty.
Parameter name: id
   at EPiServer.Scheduler.Internal.DefaultScheduledJobLogRepository.GetAsync(Guid id, Int64 startIndex, Int32 maxCount)
   at EPiServer.UI.Admin.DatabaseJob.SetupLog()
   at EPiServer.UI.Admin.DatabaseJob.OnLoad(EventArgs e)
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   at System.Web.UI.Page.HandleError(Exception e)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   at System.Web.UI.Page.ProcessRequest()
   at System.Web.UI.Page.ProcessRequest(HttpContext context)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)",

the plugin id in the DatabaseJob.aspx querystring is definately in the database and restarting the app makes this work again but this keeps coming back intermittently, has anyone else encountered this?