We have a issue recently in our workflows where it stops abruptly at Set field action. It even takes hours to complete this action. Using set field I am trying to update a people picker field using value from a choice field given in infopath form. Now this action sometimes throws error like "Could not update the item... field mismatch error" or the action runs forever. This action used to work before. But now its not. I am using a commit pending changes action after set field action even that does not help. Please advise.