Our team uses a branch build with a scripted pipeline backed by groovy scripts. The branch builds fail when run concurrently. We set them up like this at the top of the groovy script:
buildDiscarder(logRotator(artifactNumToKeepStr: '10', numToKeepStr: '10'))
After upgrading to 2.289.1 the disableConcurrentBuilds is not respected and the builds are run concurrently... and fail. We do need multiple executors for other jobs so setting # executors to 1 is not a workaround for my team.
Possibly related to: JENKINS-65673