3 hyphen not working but still get double bubble

As I separate an answer into different lines, I automatically get 2 bubbles.
If I include the triple hyphen, it then creates a bubble with — as text. Why?

To my understanding, the 3-hypen technique is only for the coach bubbles.

When you prepare the possible participant answers, each new line will appear as a new answer option (a new bubble).

Hope this help!