How to make path coverage (branches) on trait in php 100% covered

In a screen below is shown the situation where class RotueTestBase has 100% line and branch coverage, but at the bottom the trait RouteUtilTrait has 100% line coverage, but unexpectedly 0% covered of branches. What is happing here? Why?

source https://stackoverflow.com/questions/73428990/how-to-make-path-coverage-branches-on-trait-in-php-100-covered