Sonar Coverage dropping to 0 for some projects

I wanted to add pointers to the code for reference. For example:
https://sonarcloud.io/dashboard?id=onap_policy-api
The code is public here: https://github.com/onap/policy-api
And also the Jenkins job that generated this report can be found publicly:
https://jenkins.onap.org/view/policy/job/policy-api-sonar/610/

I read from another thread that part of the support for Jacoco was dropped. Is this the same reason in this case? If so, could I please have more details?