In the case of multiple multi-branch projects and using the same gitlab code repository, after restarting jenkins, only certain projects can receive events and trigger event processing
Hello,
I have similar trouble.
After restart Jenkins got Webhooks, but he doesn't processing their after this line https://github.com/jenkinsci/gitlab-branch-source-plugin/blob/5591e512558223a0282eeb0275de09c3a470f7b4/src/main/java/io/jenkins/plugins/gitlabbranchsource/GitLabWebHookListener.java#L42 .
If after restart Jenkins run "Scan GitLab Project Now" in all multibranch jobs, webhooks will begin processing as was planned.