I have a jenkins global property env variable defined as:
Then in a job, I have a "List subversion tags" parameter also named BRANCH.
Prior to updating the the latest plugins (many of them), the local job's BRANCH var overrode the global property env var.
After the update, the global property env var now takes precedence over the job's local BRANCH parameter.
I've confirmed this by removing the global one and then the local BRANCH is correct.