Coveralls badge is displaying as 'unknown'

[hafeez1988]

I have developed a springboot application with Gradle. I have integrated Jenkins and now I'm trying to integrate code coverage into my project. I was using JaCoCo coveralls with Jenkins CI for the purpose.

Gradle plugin

plugins {
   id 'com.github.kt3k.coveralls' version '2.10.1'
}

jacocoTestReport {
  reports {
    xml.enabled = true
    html.enabled = true
  }
  getClassDirectories().setFrom(classDirectories.files.collect {
        fileTree(dir: it,
                exclude: [
                '**/BmsService*'])
  })
}

And the Jenkins job invokes the following JaCoCo test command.
sh "gradle clean test jacocoTestReport coveralls"

My Jenkins build gets successful and the data is being sent to https://coveralls.io successfully.

My question is: if I do a build with a feature branch (except master), in coveralls.io the badge is not displaying properly and even the 'committed by' column is empty as well. My repository was hosted in GitHub.

Any help would be grateful!