Multibranch pipeline does not start with PR Creation - webhook works correctly

[paul123z]

Hello Team,
I want to set up an automated build in my multibranch pipeline whenever a PR is created in bitbucket.

I have configured bitbucket webhook with the correct endpoint, and I can confirm I receive the webhook correctly:
Manage Jenkins -> system log

bitbucket webhook has status 200

This is a part of my pipeline where I put the BPPR code:

Any idea why the build job in my branch within multibranch pipeline does not get triggered when PR is created? my use case has bitbucket server, not bitbucket cloud.

[paul123z]

Comment: i do not have old Bitbucket jenkins plugin installed as I'm aware that having this plugin can cause some issues with BPPR plugin
https://plugins.jenkins.io/bitbucket/