When you omit a value for "Working directory" in v1.4 it defaults to /home/jenkins and does not mount a workspace-volume in /home/jenkins. This gives us the ability to place serveral config files in the jenkins home directory (e.g. docker config) of the used image.

When you omit a value for "Working directory" in v1.5 it leaves the mountPoint value field blank when it tries to create the container and returns with an error from the k8s server. When i set "Working directory" to /home/jenkins the container will be created but it also mounts an emptyDir in /home/jenkins and overwrites everything in it. 

Which behavior is working as intended and which is a bug? If the v1.5 behavior is working as intended it would be nice if you add a feature that allows us to disable the workspace-volume mount for the working directory.