we are having this issue in SP Workflow 2013 when creating a new item. I created a simple workflow like setting a value under a specific condition. That workflow goes to started, after while it is changed to Suspended and no action happened !!
This error message that I have got when WF is Started:
Activity in progress
Retrying last request. Next attempt scheduled in less than one minute. Details of last request: HTTP BadRequest to https://myserver.fqdn/sites/teamsite/_vti_bin/client.svc/web/lists/getbyid(guid'9d2a1222-3879-46b5-9636-0326f905d80e')/Items(27) Correlation Id: Instance Id: c1890e57-5ffc-4f7c-b105-b724bbe2b26b Retry now
and this message when it is Suspended:
" RequestorId: 58a83ea3-c586-a6f3-0000-000000000000. Details: An unhandled exception occurred during the execution of the workflow instance. Exception details: System.ArgumentNullException: Value cannot be null. Parameter name: Input at Microsoft.Activities.Hosting.Runtime.Subroutine.SubroutineChild.Execute(CodeActivityContext context) at System.Activities.CodeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager) at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation)