We are experiencing a similar issue with Folder scoped credentials.
Anyone trying to fix this?
I am not trying to fix this at this time Hugo van den Brand.
This feature can be replaced by JENKINS-58170 which provides a more standardized approach to granting user-scoped credentials to builds.
There is now a new way to access user-scoped credentials detailed in JENKINS-58170 which uses credentials build parameters. These allow user-scoped credentials to be referenced in any context where you'd normally use the credentials id.