I found what I think is a small bug in the Rule Machine User Interface.
When inserting an If condition into an existing rule, the text underneath doesn't get indented to the right. I think it use to in the previous Platform Version...?
It is only a minor UI issue (Platform Version 18.104.22.168), but it can be confusing when working on complex rules. When selecting "Done with Actions", the indentation does show.
The "IF" statement inserted before "Set openDoorTimer to 0" is shown with an arrow. The text that should be indented is also identified in the example below.
As shown below, when going back to the "Define Rule" screen, all is good.