Hi Ilya
I found out that the workflows events are depricated.
So the microflow OCh_Workflow_State and OCh_WorkflowUserTask_State are not useful anymore

Instead community commons asked us to to use WFEH_WorkflowEvent_AuditTrail microflow.
To enable audit trail for all workflows in your app, follow the steps below:
- Go to App Settings > Workflows tab.
- In the event handlers section, click the New button.
- In the Add event handler dialog box, give the new event handler a name in the Name property (for example: AuditTrail).
- In the When section, select the events you want to subscribe to from the list.
- In the What section, select the WFEH_WorkflowEvent_AuditTrail microflow from the list. You can find it in the module (UseMe > Event handlers).
- To view the audit trail, a user needs to be assigned the Administrator module role.
Read the documentation for more clarity.
https://docs.mendix.com/appstore/modules/workflow-commons/#features-1
Hope it helps 🙂