HI all.

After Umbraco Cloud upgraded from 7.12.4. to 7.13.0, we are getting a tons of scheduled task about This instance has already started one or more requests.

It has something to do with the task in the umbracoSettings.config. But no matter how many or what kind of task we set in there. We get the same error. Even a simple one to load the frontpage.

It runs the first task, and then keep throwing this error after that.

Message:
Error executing scheduled task


Exception:
System.InvalidOperationException: This instance has already started one or more requests. Properties can only be modified before sending the first request.
   at System.Net.Http.HttpClient.CheckDisposedOrStarted()
   at System.Net.Http.HttpClient.set_BaseAddress(Uri value)
   at Umbraco.Web.Scheduling.ScheduledTasks.<GetTaskByHttpAync>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Umbraco.Web.Scheduling.ScheduledTasks.<ProcessTasksAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Umbraco.Web.Scheduling.ScheduledTasks.<PerformRunAsync>d__7.MoveNext()