Yeah, that is confusing sometimes for me too. Super frustrating when trying to fix an issue with the step-by-step tool.
I have noticed the debugger doesn’t work correctly on the front end ever since they changed to make the workflows run at the same time. Here is a post about how to make sure things go in the order that you want them to. If you are following these tips, then you should be fine. It should work consistently. Does that help?