The error you might see in your log is this:
EPiServer.Logging.Compatibility.LogManager+CompatibilityWrapper.Error - An exception occurred while indexing (IContent). The operation has timed out.
EPiServer.Find.ServiceException: The operation has timed out ---> System.Net.WebException: The operation has timed out
There is a possible issue with the cluster hosting the index, resulting in timeouts when the Find client is trying to reach the index to update it.
It is recommended to reach out to Managed Services (http://world.episerver.com/support/) right away first to see of potential issues with the Find cluster(s). It may involve a "bad index" and the solution may be to move that index to a working cluster. Doing that should resolve the timeouts.