We're using Bitbucket Server 5.9.1, Jenkins 2.159 and bitbucket-branch-source-plugin 2.4.0.

The automatic creation of the Webhook within Bitbucket works without any problems but when the repository changes (e.g. because of a push) we receive the following Error in Jenkins:

X-Bitbucket-Type header / server_url request parameter not found. Bitbucket Cloud webhook incoming.

And the underlying Multibranch Pipelines are not triggered.

I also checked: The Server URL is configured within Bitbucket