Using these settings on drone/drone:1.1, the Pipeline is triggered when the pull request is made but not when additional commits has been pushed.
When I try removing the trigger block it runs the pipeline normally.
This is a Bitbucket Server issue. They do not send pull_request webhooks when new code is pushed to an existing pull request (i.e. pull request synchronization events). See https://jira.atlassian.com/browse/BSERV-10279
Oh I see, so the temporary work around would be just to trigger the pipeline on push instead of pull_request. Thanks!