Can you provide a little more information? Does the user complete a task using a form? If so, you may need to look into the logic of the rule that gets executed when the form is submitted to ensure that it calls the “action a worklist item” action.
@MillaZ @flowcision When taking a specific action such as approval or rejection on a certain task in K2 INSTANCE, this action reaches K2 but does not work correctly. This issue occurs when approving approximately 80 requests."