When performing a dynamic participant resolver in the task to search in the User's customfield by the list of approvers, contains more than one loginID, separated by commas, when the task is executed it cannot find the approver and passes the Workflow to to a rejected state.
When it contains a single approver loginID it works correctly.
Release : 14.4
The dynamic resolver function does not understand the comma character in a user custom field as a separator.
Changing a pipe character (|) instead of the comma character (,) to separate each user in the Custom Field the Workflow works by taking the participant resolver users from the list contained in the User's Custom Field.