I'm using Jenkins 2.60.2. I've set up a Multibranch pipeline build. I also set up the Github side by configuring the Jenkins service via Integrations & services via the Github plugin (not the webhook option in Github).
I'm able to see the branches I want and some PRs that are sitting out there. So things seem to be working.
My issue is that when I add a commit to one of the pull requests, I see the event come through in the Repository Events, but the pull request never rebuilds in Jenkins. If I click Scan Repository Now, it detects the change and starts a new build of the PR. I would expect it to detect the change on the commit and rebuild the PR.
The other odd thing is that I have it set up to not build branches with PRs, but when I make a new PR from a new branch, it builds it as a branch (on the branches tab) but not on the PR tab. Again, running a repository scan, removes the build from the branches tab, and adds it to the PR tab. I would expect that a PR from a new branch would just create a build on the PR tab, not the branches.
I'm at a bit of a loss here. I can see when I push a change to Github, an event is getting sent to Jenkins, it just isn't behaving in the way I would expect.I'm using a Jenkinsfile in the repository if that makes any difference.