We have been using integration with CircleCI, side by side with Appveyor and TravisCI, for our project here: https://github.com/qiicr/dcmqi
The problem we experience that sometime (not always) CircleCI is not triggered for new pull requests. We did not make any changes to CircleCI setup, and for the latest PR it does not work: https://github.com/QIICR/dcmqi/pull/265, while it worked just fine for the previous PR, and we did not touch CircleCI configuration in between: https://github.com/QIICR/dcmqi/pull/264.
Can someone help us understand what is going on, how to fix this, or what could be a workaround?