ATF 'Validate Outbound Email' and document ID

I made an ATF test where I submit the incident with a Record Producer and use the 'Validate Outbound Email Generated by Notification' test to see if the notification has been sent to the user. As a Source Notification I take document_id submitted from the Record Producer. Even I set the 3 minutes timeout the test is failing.

As an alternative, I used the 'Validate Outbound Email' test, filtered out its creation on or after a minute ago and wanted to check the Subject or body if it contains the incident number, but cannot use the  document_id submitted from the Record Producer from previous steps - it is greyed out. 

Have you had this test working in your environment?

BR
Michal