When some Reporters are responding to tickets by adding a comment, the automation rule Transition on comment is not being executed. As you can see in the picture, both of the conditions are met but the rule doesn't trigger.
Is there any other way to troubleshoot than Automation Log from the Project Settings?
The Reporter has the Customer Role and here, it seems the ticket has a Request Type:

Here you can see the comment that is not triggering the rule:

And this is from the Automation Log:
