Sonar: Coverage okay in PR but not on same branch

I’m using Sonar 7.9.1.

We run branch analysis in our Jenkins multibranch setup:
sh 'mvn -B sonar:sonar -Psonar' + env.BRANCH_NAME

Now I don’t see coverage/no new lines on the analysys for the branch called feature/blabla.

Now I’ve created a PR for this branch and done the analysis and now I see the coverage report. Is this normal?

The solution here seems to fix it: Error 'WARN: Could not find ref: Develop in refs/heads or refs/remotes/origin' after updating to 7.6