Status on PR not updating. Shows "Waiting for status to be reported"

In this project, there is a connected Circle CI check. Whenever someone sends a PR, the Circle CI check takes place. It was working fine but recently this check is not running and a PR always shows “Waiting for status to be reported”. For example, in this PR, circle CI check is stuck and not running. Though the build is working fine every time but the status is not reported on PR. Can someone please help us in resolving this issue.