Your blueprint is not symmetric and you marked the wrong signals. I have marked with arrows the two misplaced signals on your screenshot. In my testing the blueprint is built as designed every time.


I stared at this thing for too long ...
Sorry for wasting your time, you are absolutely correct ...

Hello. I have an issue that's kind of a feature request. I have a X-intersection blueprint for my trains. The problem occurs when I let bots build the blueprint for me- the circled signals have a chance to flip to a different train track, depending on which one was build first by the bots

Here is ...