Whenever a multi branch project gets reindexed, every branch with a discovered Jenkinsfile triggers a build. I have logic in my Jenkinsfiles that actually deploys into a specified infrastructure environment if a build is triggered on the develop branch. If the project gets re-indexed, then Jenkins will attempt to deploy (and not just test) when I would strongly prefer that it not deploy.
It would be an improvement to allow users to configure indexing to only initiate a build if the branch is new to the multi branch project. I believe this would be the preferred behavior for many.