Line justification question

Just a question : why Dorico don’t correct justification between different lines of a score. In the attached score, for example, why the three first lines are there not divided each in four bars ? It’s an issue I encounter many times.
Thank you in advance.
Jesous Ahatonnia.dorico (377.4 KB)

Because the Note Spacing value in Layout Options can fit more than 4 bars to a line. You’ve also added a System Break which doesn’t improve things.

Without your system break, you get 5, 4, 4, 5, which spaces the music rather nicely.

The System Break is desired in order to separate the “refrain”.
It should be an improvement for Dorico to reorder automatically the bars of different lines.
Thank you for your answer.